increasing unit test coverage
Merge branch 'master' of https://github.com/nmdp-bioinformatics/ngs into test-coverage
increasing unit test coverage
Merge pull request #84 from mheuer-nmdp/test-coverage

Increasing unit test coverage
refactoring runnable tools --> callable
Merge pull request #86 from mheuer-nmdp/callable-tools

Refactoring runnable tools --> callable