Merge branch 'release/v0.2.3.2' into develop
add support for py.test in virtualenv
increase modularity/code re-use
fix invocation
tests pass
rename and cleanup
add generic header support
finish cleanup
Merge branch 'feature/pytest' into develop
auto-download py.test for testing
Merge branch 'release/v0.2.3.3'
bump version
Merge branch 'release/0.2.3.4'