Import complete history of CVS repositories from Sourceforge

[Trilarion]

Now that I know how to do that with rsync and svn2git I think it's not much effort to actually have the real history of Freerails (starting in 2000) in Git and although that might lead to conflicts with existing forks, the number of existing forks isn't that high, nor have I heard of significant activity within these forks. Now is the time to do that.