Added a few method docs, and updated the README
Merge pull request #20 from massenz/dev

Added a few method docs, and updated the README
Use setdefault for os.environ environment udpdate
Fix tests
Merge pull request #21 from Birdback/use-setdefault-for-os-environ

Use setdefault for os.environ environment update
Bump 0.2.6
Merge branch 'dev'