fusetools-1205 - create a seperate independently installable update site...

... - update JBTIS TP to 4.2.0.Beta1b

The generated org.fusesource.ide.updatesite-7.3.0-SNAPSHOT.zip can not be installed unless JBTIS was installed first.  If you unzip the update site you'll see repository/withreferences composite directory.  That may be installed independently (right into a fresh eclipse instance).  The live update site will have the repository/withreferences directory available for independent QE installs.