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
Cleaning up Ramp output to be more legible and informative. Adding summary of results to end of output.
Support for feature subtraction
Adding prettytable requirement
Random Forest importance reporter
Support for custom cross-val runner in shortcuts. Formatting fix.