GermlineStandardCaller: skip loci with no evidence for any genotype
adding CONTRIBUTING.md
Clean up callVariantsAtLocus a bit in GermlineStandardCaller
Merge pull request #267 from hammerlab/contributing

Adding CONTRIBUTING.md
Merge pull request #265 from hammerlab/pt189-tweaks

Pt189 tweaks
move from package org.bdgenomics to org.hammerlab
Merge pull request #268 from hammerlab/package-rename

Move from package org.bdgenomics to org.hammerlab
trying to set release dependencies in maven