New class handles (vastly more cleanly) the db of tribble codecs, features, and names for use throughout the GATK.
Added SelfScopingFeatureCodec interface that allows a FeatureCodec to examine a file and determine if the file can be parsed. This is the first step towards allowing the GATK to dynamically determine the type of a RodBinding.
Removing unused files RODRecordIterator, ReferenceOrderedData, QueryableTrack, RMDTrackCreationException, GATKFeatureIterator, ReferenceOrderedDataUnitTest
Refactored dbSNP and refseq utilities to be closer to the other files implementing these features