Preparing 0.4 release of Gebabbel

I have just integrated a french translation (credits to Lionel Maraval), some copyright files (thanks to Hanno Stock) and the gpsbabel sources into the Gebabbel source tree. If I survive struggling with the release system of sourceforge.net, I will release the source and binaries for Windows, Linux and Mac OS X during the next couple of days. If you want to help testing, feel free to catch the preliminary source package.