1. branch, to build the module from a given branch.
2. tag, to build the module from a tag (BUT DON'T USE THIS, use Konstruct or a
        tarball).
3. override-url, for when it turns out that I wasn't smart enough, you can
                 tell kdesvn-build exactly where to find what you want.

Also, update the man page information, and update the documentation to be in
sync with /trunk.

svn path=/trunk/KDE/kdesdk/doc/scripts/kdesvn-build/; revision=423616