Building JBoss is currently only supported by using the command line build.sh or build.bat scripts.
I personally don't know anything about WSAD, so I can't help you there at all.
There are many dependency libraries (with specific versions) that must be used to build the system correctly, inclucing some custom tasks which glue together the different modules.
It is planned to proivide more support of other entry points (like WSAD or even a preinstalled Ant), but it is not currently supported.
Refer to the buildsystem guide and faq for more information: