Refactored SequenceDictionary aggregation to eliminate replication between RDD extensions, and to improve speed. Additionally, refactored SequenceDictionary class to reduce GC overhead and to make class immutable.
update maven-surefire-plugin dependency version to 2.17, also create an entry in pluginManagement for git-commit-id-plugin
bqsr read from vcf
Merge pull request #179 from heuermh/surefire-2_17

Update maven-surefire-plugin dependency version to 2.17, also create an ...
Merge pull request #180 from hammerlab/bqsr-vcf

BQSR using vcf loader
Merge pull request #162 from fnothaft/sequence-dictionary-rdd-funcs

Refactored SequenceDictionary