moving source code hosting to Launchpad.net

As SourceForge is not going to support Bazaar anymore, I have decided to move log4cplus source code hosting from SourceForge to Launchpad.net. I have decided to stick with Bazaar for some more time instead of moving to Github because it simply requires less effort than having to start using Git and Github. I am moving only the source code repository. Everything else (bug tracker, pages, etc.) stays on SourceForge.