Added dependency to gensim
Started cleaning up docstring, making things a little more Pythonic
Fleshing out docstrings, Flake8'ing for PEP8
More cleaning and adding of docstrings
Continued docstring-ing
Bug fix for case where self.features=None, header added to base.py
Merge pull request #6 from wrobstory/master

Added gensim dependency, docstrings, Flake8 for PEP8, bug fixes