Implement contig-to-RefSeq translation, refactor SequenceDictionary with RefSeq information (and without numeric IDs) and prepare ADAMGenotype for incorporating reference model information.
Further implement reference model in variant conversion and address comments in PR re: incorporation of RefSeq IDs into SequenceDictioanry
Further address comments in PR re: incorporation of RefSeq IDs into SequenceDictioanry
Rebase work onto master
Merge pull request #243 from massie/pr238

Rebase PR#238 onto master