only push py2.7 test build

switched Travis to use language: minimal and dist: trusty

switched Travis to use language: minimal and dist: trusty

Merge pull request #223 from hammerlab/maf_loading_fixes

Fixes to load_maf

Merge pull request #222 from hammerlab/varcode-add-distinct

Adding 'distinct' as a parameter to load_vcf.

Merge pull request #218 from tuomastik/optional_sorting_load_vcf_maf

Allow user to affect the sorting of variants when loading a VCF or MAF.

Merge pull request #209 from hammerlab/maf_improvements

Add optional_cols list to load_maf

Merge pull request #203 from hammerlab/stoploss-with-extra-codons

Adding aa_ref argument to StopLoss for variants which delete codons before stop

Merge pull request #199 from hammerlab/serialize-intronic-splice-site

explicit args to __init__ of Intronic splice effects fixes serialization

Merge pull request #197 from hammerlab/varcode-logger

One logger per module.