Hi
I mannaged to build the project from maven, if someone ever has the same issue the file you need has the name "static-resource-mappings.properties"
this are its contents:
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org.richfaces\:inputNumberSpinner.js=org.richfaces/inputNumberSpinner.js
org.richfaces\:close_act.gif=org.richfaces/close_act.gif
org.richfaces\:jquery-dnd.js=org.richfaces/jquery-dnd.js
org.richfaces\:popupPanelSizer.js=org.richfaces/popupPanelSizer.js
org.richfaces\:reorderMarker.gif=org.richfaces/reorderMarker.gif
org.richfaces\:boolean-converter.js=org.richfaces/boolean-converter.js
org.richfaces\:extendedDataTable.js=org.richfaces/extendedDataTable.js
org.richfaces\:mark_list.gif=org.richfaces/mark_list.gif
org.richfaces.images\:chevronUpDisabled.png=%skin%/org.richfaces.images/chevronUpDisabled-4.0.0.Final.png
org.richfaces.images\:spinnerArrowBottom.png=%skin%/org.richfaces.images/spinnerArrowBottom-4.0.0.Final.png
org.richfaces.images\:standardButtonBgImage.png=%skin%/org.richfaces.images/standardButtonBgImage-4.0.0.Final.png
org.richfaces\:popupList.js=org.richfaces/popupList.js
org.richfaces.images\:comboDownButton.png=%skin%/org.richfaces.images/comboDownButton-4.0.0.Final.png
org.richfaces\:combo_list_shadow.png=org.richfaces/combo_list_shadow.png
org.richfaces\:regex-validator.js=org.richfaces/regex-validator.js
org.richfaces\:extendedDataTable.ecss=%skin%/org.richfaces/extendedDataTable.css
org.richfaces\:log.js=org.richfaces/log.js
org.richfaces\:popupPanelBorders.js=org.richfaces/popupPanelBorders.js
org.richfaces.images\:triangleUpDisabled.png=%skin%/org.richfaces.images/triangleUpDisabled-4.0.0.Final.png
org.richfaces\:calendar-utils.js=org.richfaces/calendar-utils.js
org.richfaces.images\:last.png=%skin%/org.richfaces.images/last-4.0.0.Final.png
org.richfaces\:node_icon.gif=%skin%/org.richfaces/node_icon.gif
org.richfaces\:fileupload.ecss=%skin%/org.richfaces/fileupload.css
org.richfaces.images\:grid.png=%skin%/org.richfaces.images/grid-4.0.0.Final.png
org.richfaces.images\:sliderDisabledArrowLeft.png=%skin%/org.richfaces.images/sliderDisabledArrowLeft-4.0.0.Final.png
org.richfaces.images\:chevronDown.png=%skin%/org.richfaces.images/chevronDown-4.0.0.Final.png
org.richfaces.images\:sliderSelectedArrowRight.png=%skin%/org.richfaces.images/sliderSelectedArrowRight-4.0.0.Final.png
org.richfaces\:progressBar.ecss=%skin%/org.richfaces/progressBar.css
org.richfaces\:JQuerySpinBtn.js=org.richfaces/JQuerySpinBtn.js
org.richfaces.images\:actTabBottomBg.png=%skin%/org.richfaces.images/actTabBottomBg-4.0.0.Final.png
org.richfaces.images\:gridSeparatorImage.gif=%skin%/org.richfaces.images/gridSeparatorImage-4.0.0.Final.gif
org.richfaces\:popupPanel.ecss=%skin%/org.richfaces/popupPanel.css
org.richfaces\:panelMenu.ecss=%skin%/org.richfaces/panelMenu.css
org.richfaces\:togglePanel.js=org.richfaces/togglePanel.js
org.richfaces\:tabPanel.js=org.richfaces/tabPanel.js
org.richfaces\:accordion.ecss=%skin%/org.richfaces/accordion.css
org.richfaces.images\:dsDigGrad.png=%skin%/org.richfaces.images/dsDigGrad-4.0.0.Final.png
net.java.dev.atmosphere\:jquery-atmosphere.js=net.java.dev.atmosphere/jquery-atmosphere.js
org.richfaces.images\:inputErrorIcon.png=%skin%/org.richfaces.images/inputErrorIcon.png-4.0.0.Final.gif
org.richfaces.images\:sliderDisabledArrowRight.png=%skin%/org.richfaces.images/sliderDisabledArrowRight-4.0.0.Final.png
org.richfaces\:calendar.ecss=%skin%/org.richfaces/calendar.css
richfaces.js=richfaces.js
org.richfaces\:status.js=org.richfaces/status.js
org.richfaces.images\:inplaceBtnPressGrad.png=%skin%/org.richfaces.images/inplaceBtnPressGrad-4.0.0.Final.png
org.richfaces\:datascroller.js=org.richfaces/datascroller.js
org.richfaces\:fu-add-dis.gif=org.richfaces/fu-add-dis.gif
org.richfaces.images\:pbAniBg.gif=%skin%/org.richfaces.images/pbAniBg-4.0.0.Final.gif
org.richfaces\:fileupload.js=org.richfaces/fileupload.js
org.richfaces\:dnd-draggable.js=org.richfaces/dnd-draggable.js
richfaces-base-component.js=richfaces-base-component.js
org.richfaces.images\:tabLineBg.png=%skin%/org.richfaces.images/tabLineBg-4.0.0.Final.png
org.richfaces.images\:minus.png=%skin%/org.richfaces.images/minus-4.0.0.Final.png
org.richfaces\:tooltip.js=org.richfaces/tooltip.js
org.richfaces\:tree.ecss=%skin%/org.richfaces/tree.css
org.richfaces.images\:disc.png=%skin%/org.richfaces.images/disc-4.0.0.Final.png
org.richfaces\:log.ecss=%skin%/org.richfaces/log.css
org.richfaces.images\:triangleUp.png=%skin%/org.richfaces.images/triangleUp-4.0.0.Final.png
org.richfaces.images\:disabledCalendarIcon.png=%skin%/org.richfaces.images/disabledCalendarIcon-4.0.0.Final.png
org.richfaces\:bg_shadow.png=org.richfaces/bg_shadow.png
org.richfaces.images\:inputBackgroundImage.png=%skin%/org.richfaces.images/inputBackgroundImage-4.0.0.Final.png
org.richfaces.images\:fuBtnDisGrad.png=%skin%/org.richfaces.images/fuBtnDisGrad-4.0.0.Final.png
org.richfaces\:fu-add.gif=org.richfaces/fu-add.gif
org.richfaces\:toolbar.js=org.richfaces/toolbar.js
org.richfaces\:collapsible-subtable.js=org.richfaces/collapsible-subtable.js
org.richfaces.images\:gridDisabled.png=%skin%/org.richfaces.images/gridDisabled-4.0.0.Final.png
org.richfaces\:dnd-droppable.js=org.richfaces/dnd-droppable.js
org.richfaces.images\:sliderArrowBottom.png=%skin%/org.richfaces.images/sliderArrowBottom-4.0.0.Final.png
org.richfaces.images\:spinnerDisabledArrowTop.png=%skin%/org.richfaces.images/spinnerDisabledArrowTop-4.0.0.Final.png
org.richfaces\:dnd-indicator.js=org.richfaces/dnd-indicator.js
org.richfaces\:inputBase.js=org.richfaces/inputBase.js
org.richfaces\:panelMenuGroup.js=org.richfaces/panelMenuGroup.js
org.richfaces.images\:calendarButtonDown.png=%skin%/org.richfaces.images/calendarButtonDown-4.0.0.Final.png
skinning_both.ecss=%skin%/skinning_both.css
org.richfaces.images\:chevronDownDisabled.png=%skin%/org.richfaces.images/chevronDownDisabled-4.0.0.Final.png
org.richfaces\:mark_changed.gif=org.richfaces/mark_changed.gif
org.richfaces.images\:comboDisabledDownButton.png=%skin%/org.richfaces.images/comboDisabledDownButton-4.0.0.Final.png
org.richfaces\:fu-clr.gif=org.richfaces/fu-clr.gif
org.richfaces.images\:chevron.png=%skin%/org.richfaces.images/chevron-4.0.0.Final.png
org.richfaces\:inputNumberSlider.ecss=%skin%/org.richfaces/inputNumberSlider.css
org.richfaces\:datatable.ecss=%skin%/org.richfaces/datatable.css
org.richfaces.images\:buttonBackgroundImage.png=%skin%/org.richfaces.images/buttonBackgroundImage-4.0.0.Final.png
org.richfaces.images\:triangleLeft.png=%skin%/org.richfaces.images/triangleLeft-4.0.0.Final.png
org.richfaces\:Autocomplete.js=org.richfaces/Autocomplete.js
org.richfaces.images\:standardButtonPressedBgImage.png=%skin%/org.richfaces.images/standardButtonPressedBgImage-4.0.0.Final.png
org.richfaces\:long-range-validator.js=org.richfaces/long-range-validator.js
org.richfaces\:down_icon.gif=org.richfaces/down_icon.gif
org.richfaces\:jquery.mousewheel.js=org.richfaces/jquery.mousewheel.js
org.richfaces\:required-validator.js=org.richfaces/required-validator.js
org.richfaces\:leaf_icon.gif=%skin%/org.richfaces/leaf_icon.gif
org.richfaces\:error.png=org.richfaces/error.png
org.richfaces\:json-dom.js=org.richfaces/json-dom.js
org.richfaces\:menugroup.js=org.richfaces/menugroup.js
org.richfaces\:push.js=org.richfaces/push.js
org.richfaces\:panelMenuItem.js=org.richfaces/panelMenuItem.js
org.richfaces.images\:autocompleteButtonGradient.png=%skin%/org.richfaces.images/autocompleteButtonGradient-4.0.0.Final.png
org.richfaces.images\:autocompleteFieldGradient.png=%skin%/org.richfaces.images/autocompleteFieldGradient-4.0.0.Final.png
org.richfaces\:progressBar.js=org.richfaces/progressBar.js
org.richfaces.images\:sliderDisabledArrowBottom.png=%skin%/org.richfaces.images/sliderDisabledArrowBottom-4.0.0.Final.png
org.richfaces.images\:sliderArrowLeft.png=%skin%/org.richfaces.images/sliderArrowLeft-4.0.0.Final.png
org.richfaces\:collapsible-subtable-toggler.js=org.richfaces/collapsible-subtable-toggler.js
org.richfaces\:AutocompleteBase.js=org.richfaces/AutocompleteBase.js
org.richfaces\:msg.ecss=%skin%/org.richfaces/msg.css
spacer.gif=spacer.gif
org.richfaces\:tooltip.ecss=%skin%/org.richfaces/tooltip.css
javax.faces\:jsf.js=javax.faces/jsf.js
org.richfaces.images\:sliderSelectedArrowLeft.png=%skin%/org.richfaces.images/sliderSelectedArrowLeft-4.0.0.Final.png
org.richfaces\:ico_ok.gif=org.richfaces/ico_ok.gif
richfaces-selection.js=richfaces-selection.js
org.richfaces\:inplaceInput.js=org.richfaces/inplaceInput.js
org.richfaces.images\:dsBtnGrad.png=%skin%/org.richfaces.images/dsBtnGrad-4.0.0.Final.png
org.richfaces.images\:triangleLeftDisabled.png=%skin%/org.richfaces.images/triangleLeftDisabled-4.0.0.Final.png
org.richfaces.renderkit.html.BaseGradient=%skin%/org.richfaces/images/BaseGradient-4.0.0.Final.png
org.richfaces\:icons.ecss=%skin%/org.richfaces/icons.css
org.richfaces.images\:spinnerArrowTop.png=%skin%/org.richfaces.images/spinnerArrowTop-4.0.0.Final.png
org.richfaces.images\:spinnerDisabledArrowBottom.png=%skin%/org.richfaces.images/spinnerDisabledArrowBottom-4.0.0.Final.png
org.richfaces.images\:squareSeparatorImage.gif=%skin%/org.richfaces.images/squareSeparatorImage-4.0.0.Final.gif
richfaces-event.js=richfaces-event.js
org.richfaces.images\:buttonHoverBackgroundImage.png=%skin%/org.richfaces.images/buttonHoverBackgroundImage-4.0.0.Final.png
org.richfaces.images\:lineSeparatorImage.gif=%skin%/org.richfaces.images/lineSeparatorImage-4.0.0.Final.gif
org.richfaces\:list.ecss=%skin%/org.richfaces/list.css
org.richfaces\:warning.png=org.richfaces/warning.png
org.richfaces.images\:actRightTabBg.png=%skin%/org.richfaces.images/actRightTabBg-4.0.0.Final.png
org.richfaces\:collapsiblePanel.js=org.richfaces/collapsiblePanel.js
org.richfaces\:ico_cancel.gif=org.richfaces/ico_cancel.gif
org.richfaces\:jquery.effects.highlight.js=org.richfaces/jquery.effects.highlight.js
richfaces-jsf-log.js=richfaces-jsf-log.js
org.richfaces\:up_icon.gif=org.richfaces/up_icon.gif
org.richfaces\:collapsiblePanelItem.js=org.richfaces/collapsiblePanelItem.js
org.richfaces\:ico.gif=org.richfaces/ico.gif
org.richfaces.images\:sliderSelectedArrowBottom.png=%skin%/org.richfaces.images/sliderSelectedArrowBottom-4.0.0.Final.png
org.richfaces.images\:chevronUp.png=%skin%/org.richfaces.images/chevronUp-4.0.0.Final.png
org.richfaces\:menuKeyNavigation.js=org.richfaces/menuKeyNavigation.js
org.richfaces\:ok.png=org.richfaces/ok.png
org.richfaces\:inplaceBase.js=org.richfaces/inplaceBase.js
org.richfaces\:tabPanel.ecss=%skin%/org.richfaces/tabPanel.css
org.richfaces\:menuitem.js=org.richfaces/menuitem.js
org.richfaces\:menu.js=org.richfaces/menu.js
org.richfaces\:message.js=org.richfaces/message.js
jquery.js=jquery.js
org.richfaces.images\:tabBg.png=%skin%/org.richfaces.images/tabBg-4.0.0.Final.png
org.richfaces\:inplaceInput.ecss=%skin%/org.richfaces/inplaceInput.css
org.richfaces\:fatal.png=org.richfaces/fatal.png
org.richfaces.images\:chevronDisabled.png=%skin%/org.richfaces.images/chevronDisabled-4.0.0.Final.png
org.richfaces\:inplaceSelect.ecss=%skin%/org.richfaces/inplaceSelect.css
org.richfaces\:close.gif=org.richfaces/close.gif
org.richfaces\:datascroller.ecss=%skin%/org.richfaces/datascroller.css
org.apache.myfaces\:oamSubmit.js=org.apache.myfaces/oamSubmit.js
org.richfaces\:panel.ecss=%skin%/org.richfaces/panel.css
org.richfaces.images\:calendarButtonUp.png=%skin%/org.richfaces.images/calendarButtonUp-4.0.0.Final.png
org.richfaces.images\:inplaceBtnGrad.png=%skin%/org.richfaces.images/inplaceBtnGrad-4.0.0.Final.png
org.richfaces\:poll.js=org.richfaces/poll.js
org.richfaces\:jquery-ui-core.js=org.richfaces/jquery-ui-core.js
org.richfaces.images\:chevronLeft.png=%skin%/org.richfaces.images/chevronLeft-4.0.0.Final.png
org.richfaces\:fu-upl.gif=org.richfaces/fu-upl.gif
org.richfaces.images\:menu_list_bg.gif=%skin%/org.richfaces.images/menu_list_bg.gif-4.0.0.Final.png
org.richfaces\:info.png=org.richfaces/info.png
org.richfaces\:length-validator.js=org.richfaces/length-validator.js
org.richfaces\:inputNumberSpinner.ecss=%skin%/org.richfaces/inputNumberSpinner.css
org.richfaces\:indicator.ecss=%skin%/org.richfaces/indicator.css
org.richfaces\:toolbar.ecss=%skin%/org.richfaces/toolbar.css
org.richfaces\:datatable.js=org.richfaces/datatable.js
org.richfaces\:short-converter.js=org.richfaces/short-converter.js
org.richfaces.images\:dotSeparatorImage.gif=%skin%/org.richfaces.images/dotSeparatorImage-4.0.0.Final.gif
org.richfaces.images\:line.png=%skin%/org.richfaces.images/line-4.0.0.Final.png
richfaces-utils.js=richfaces-utils.js
org.richfaces\:accordion.js=org.richfaces/accordion.js
org.richfaces\:accordionItem.js=org.richfaces/accordionItem.js
jquery.position.js=jquery.position.js
org.richfaces.images\:triangleDown.png=%skin%/org.richfaces.images/triangleDown-4.0.0.Final.png
org.richfaces.images\:sliderArrowRight.png=%skin%/org.richfaces.images/sliderArrowRight-4.0.0.Final.png
org.richfaces\:component-control.js=org.richfaces/component-control.js
org.richfaces.images\:calendarSeparator.png=%skin%/org.richfaces.images/calendarSeparator-4.0.0.Final.png
org.richfaces.images\:triangleDisabled.png=%skin%/org.richfaces.images/triangleDisabled-4.0.0.Final.png
org.richfaces.images\:plus.png=%skin%/org.richfaces.images/plus-4.0.0.Final.png
org.richfaces.images\:pmenu_bg_dis.png=%skin%/org.richfaces.images/pmenu_bg_dis-4.0.0.Final.png
org.richfaces\:collapsiblePanel.ecss=%skin%/org.richfaces/collapsiblePanel.css
org.richfaces\:popup.js=org.richfaces/popup.js
org.richfaces.images\:buttonDisabledBackgroundImage.png=%skin%/org.richfaces.images/buttonDisabledBackgroundImage-4.0.0.Final.png
org.richfaces\:collapsible-subtable.ecss=%skin%/org.richfaces/collapsible-subtable.css
org.richfaces.images\:menuNodeImage.gif=%skin%/org.richfaces.images/menuNodeImage-4.0.0.Final.gif
skinning.ecss=%skin%/skinning.css
org.richfaces\:Autocomplete.ecss=%skin%/org.richfaces/Autocomplete.css
org.richfaces\:select.ecss=%skin%/org.richfaces/select.css
org.richfaces\:csv.js=org.richfaces/csv.js
org.richfaces.images\:fuBtnGrad.png=%skin%/org.richfaces.images/fuBtnGrad-4.0.0.Final.png
org.richfaces\:byte-converter.js=org.richfaces/byte-converter.js
org.richfaces\:spacer.gif=org.richfaces/spacer.gif
org.richfaces\:richfaces-csv.js=org.richfaces/richfaces-csv.js
org.richfaces\:datagrid.ecss=%skin%/org.richfaces/datagrid.css
org.richfaces.images\:triangle.png=%skin%/org.richfaces.images/triangle-4.0.0.Final.png
org.richfaces.images\:actTabBg.png=%skin%/org.richfaces.images/actTabBg-4.0.0.Final.png
org.richfaces.images\:menu_item_bg.gif=%skin%/org.richfaces.images/menu_item_bg.gif-4.0.0.Final.png
org.richfaces.images\:actLeftTabBg.png=%skin%/org.richfaces.images/actLeftTabBg-4.0.0.Final.png
org.richfaces.images\:calendarIcon.png=%skin%/org.richfaces.images/calendarIcon-4.0.0.Final.png
org.richfaces\:popupPanel.js=org.richfaces/popupPanel.js
org.richfaces\:double-range-validator.js=org.richfaces/double-range-validator.js
org.richfaces.images\:dsBtnGradOver.png=%skin%/org.richfaces.images/dsBtnGradOver-4.0.0.Final.png
org.richfaces\:tab.js=org.richfaces/tab.js
org.richfaces\:tree.js=org.richfaces/tree.js
org.richfaces\:inputNumberSlider.js=org.richfaces/inputNumberSlider.js
org.richfaces\:jquery.component.js=org.richfaces/jquery.component.js
org.richfaces\:menu-base.js=org.richfaces/menu-base.js
skinning_classes.ecss=%skin%/skinning_classes.css
org.richfaces\:select.js=org.richfaces/select.js
org.richfaces\:calendar.js=org.richfaces/calendar.js
org.richfaces.images\:discDisabled.png=%skin%/org.richfaces.images/discDisabled-4.0.0.Final.png
org.richfaces.images\:colHdrGrad.png=%skin%/org.richfaces.images/colHdrGrad-4.0.0.Final.png
org.richfaces\:jquery.effects.core.js=org.richfaces/jquery.effects.core.js
org.richfaces.images\:chevronLeftDisabled.png=%skin%/org.richfaces.images/chevronLeftDisabled-4.0.0.Final.png
org.richfaces\:number-converter.js=org.richfaces/number-converter.js
org.richfaces.images\:pmenu_bg.png=%skin%/org.richfaces.images/pmenu_bg-4.0.0.Final.png
org.richfaces\:panelMenu.js=org.richfaces/panelMenu.js
org.richfaces.images\:insldrTrackGrad.png=%skin%/org.richfaces.images/insldrTrackGrad-4.0.0.Final.png
org.richfaces\:togglePanelItem.js=org.richfaces/togglePanelItem.js
org.richfaces\:inplaceSelect.js=org.richfaces/inplaceSelect.js
richfaces-queue.js=richfaces-queue.js
org.richfaces.images\:gradientA.png=%skin%/org.richfaces.images/gradientA-4.0.0.Final.png
org.richfaces\:dropdownmenu.ecss=%skin%/org.richfaces/dropdownmenu.css
org.richfaces.images\:triangleDownDisabled.png=%skin%/org.richfaces.images/triangleDownDisabled-4.0.0.Final.png