VDrift data manager discussion

[thelusiv]

Might make sense to separate the SVN revision number from the directory, unless we plan on having several directories under one listing, which I don't see as necessary. A config file representing all the sources is a good idea though.

I haven't had time to look at this recently and one big problem was that it wasn't working on my 64-bit desktop, so it's hard for me to mess with it, but I'll try it again sometime soon and try to make some contributions.