Add MVR and IVR to gamgee.h
Add sample subsetting to MultipleVariantReader
- move VariantReader::init_samples() to variant_utils and rename
- refactor variant subset testing
- incomplete due to Issue #209
Add test for MultipleVariantReader GVCF and GBCF
Add a test for input files with different variants
- includes matching and non-matching records
- includes multiple records in a file at the same location
Travis
Merge pull request #210 from broadinstitute/jt_mvr_126

Updates and tests for MultipleVariantReader