Patch Set 1: I would prefer that you didn't submit this; No score

Thanks for writing this!  I've been putting off adding a pgm.Config class because we didn't have the ability to enumerate the sections and keys.

Please also add some new JUnit test cases to RepositoryConfigTest to cover the section name functions you are adding.

Once this is submitted, I'll follow-up with a resurrected copy of my pgm.Config class that I started writing, but never finished.