OpenPetra.build: retrieve VCS Revision Info as part of 'nant generateSolution' at Matthias' requiest. 
That means that the text file \delivery\bin\vcs-revision.txt is now always created and that the Bazaar Rev. Number is now always shown in the Main Menus' Title Bar, also for the developers and not just for the Testers (only for DEBUG Builds, though).