Merge pull request #2 from fnothaft/master

Added map/Sanger quality scores to Pileup.
Modified Variant and Pileup structures after conversation with Chris and Matt.
Merge pull request #3 from fnothaft/adam-variant

Modified Variant and Pileup structures
Add ReadGroup (RG) information to the ADAMRecord
Merge pull request #4 from massie/matt-recordGroup

Add ReadGroup (RG) information to the ADAMRecord
Revert "Modified Variant and Pileup structures after conversation with Chris and Matt."

This reverts commit f0235ff8c551b46ee34e55f2ece95e770f1fcc43. We need to make
Reads2Ref updates based on this new schema.
Use all available cores when running in local mode
Merge remote-tracking branch 'upstream/master'