NOBUG: added handling for failed clone operation
Merge pull request #24 from samhemelryk/install-fail

NOBUG: added handling for failed clone operation
NOBUG: Fix rc transitions

When moving from rc1+ to rc2, there was a bug
leading to incorrect rc1+rc2 $version. This fixes
it by allowing the rc\d+? => rc\d transitions.
Merge pull request #25 from stronk7/master

NOBUG: Fix rc transitions