update version keys to something more planned
update version keys to something more planned

first_version and version_regexp clearly just "evolved"; so let's try to rig
something more regular via a sort of gitconfig-like dot namespacing:

    version.first
    version.regexp
    etc, etc

Hopefully this will allow us to keep things somewhat predictable :)

RsrchBoy/dist-zilla-stash-store-git