we're adding the thread model.
we're half way (so with compilation problems and tests not yet running again). but we still want to commit to share it between me and alejandro.
hopefully that is ok with you guys. let me know if it was not :-)
in any case, we created a tag called 'no_threading_model' that is the last stable version.
we also did some renamings (as earlier discussed) and some class shuffling.