Enable tag inheritance in koji module
Fix a few small regressions (rev 1)

  - honor devel flag in gem dependency checker
  - flatten targets list in version checker
Merge pull request #73 from ManageIQ/regression_fixes

Fix a few small regressions
Merge pull request #71 from ManageIQ/koji-inheritance

Enable tag inheritance in koji module
Relax polisher deps, gracefully fail if missing (rev 2)

Now polisher gem contains minimal runtime deps w/ mechanism
to catch runtime load errors. Components missing reqs will
not be accessible / calling methods on them will indicate
to install optional dependencies