Merge pull request #24 from trin5tensa/master

pigjar-23 Refactoring iterevent (Rich date comparisons for events)
Merge pull request #25 from trin5tensa/Google-Doc-Strings

Merge pull request #24 from trin5tensa/master
Merge pull request #26 from trin5tensa/pigjar-22

pigjar-22 Python 3 conversion and Google docstrings
Create doc_reqs.txt
Delete doc_reqs.txt
Merge pull request #35 from trin5tensa/permstor

Permstor
pigjar-28