Include jbpm4 into build

We should get jbpm4 into the jbosstools build so it becomes accessible and available for testing.

As discussed on phone we will initially just want this in the JBT build, but not in JBDS and we are ok with having jbpm3 and jpbm4 overlap with functionallity for a while as long as when we reach GA the two will be aligned/compatible.

Koen, first step is for you to add info here on which svn/cvs plugins/features we need to include and then reassign this to Nick who can help out integrate it into our current build.