Sphinx-generated documentation sketch including source-code docs generating
etl_api.py commented as a template for sphinx
some other modules commented to have an idea how it could look like
Merge pull request #30 from wejnik/docs

Sphinx-generated documentation sketch including source-code docs generating
fixes #32
git - commit stats working (fixes #18)
git - commit small bugfix
result - small improvements
activity import inconsistency warn -> debug
result - bugfixes
activity history inconsistencies - log also types
result - history refactor
result - bounds date parsing bugfix