initial cleanup of skeleton.py for formatting, PEP8
added get_files helper method
added method to convert a file into list of tokens, removing whitespace and punctuation
added missing imports, added methods for converting tokens into stems, and for removing stop_words from a set of words
stopping for tonight.  proceeded with vocab set, but thinking this may not be best.  See notes for next steps.
fixed typo
refactored tokenizing after giving flexibility, order, and the need to avoid sets in order to build most frequent word dict
have code building sorted dicts, sorted by word frequency
able to build vocabulary
need to move to master, no real changes
I think vectorize is working
have basics working, but it is slow
Merge pull request #1 from perryhook/skeleton

Skeleton