PDCLib: VCS switched from Sourceforge CVS to local SVN.

For practical reasons (99.9% of the work being done while without a network connection) I have transferred the sources from the SourceForge CVS to a Subversion repository on my laptop. This makes many things easier for me.

As far as I know, Sourceforge is planning to offer SVN support some time soon, so perhaps there is a way to keep my offline repos and the public SF one in sync in the future. If not, I am thinking about offering a SVN dump together with the packaged releases to provide a history of changes.

The current v0.x releases are pre-alpha anyway, and of limited use for the general audience.