[development] Naming the CVS abstraction module

[andy at spiders-lair.com]

> Yes, I think that one is sensible. I'm currently drawn between 
> versioncontrol.module (longer code, but better name) and vcs.module
> (short code, not so perfect name).

The longer name is nice but, as said, since it'll integrate in a few places
vcs.module gets my vote. Given the fact that projects have both a long
name (for normal display purposes) and a short name (for files and function)
I don't see the short name being much of an issue?

--Andy