added path_list arg to TextFileStreamer
new version of word_tokenize
Bugfix: Add "import sys" statement to text_text
Merge pull request #15 from ApproximateIdentity/bugfix-text_text

Bugfix: Add "import sys" statement to text_text
added paths assert to TextFileStreamer
Merge pull request #14 from columbia-applied-data-science/path_list

added path_list arg to TextFileStreamer
new release num in setup
ML meetup notebook added
first pass at adding method to_scipysparse
fix a few variable names and add the token -> col map to the cache
bug in streamers
Merge pull request #17 from mdeland/streamer_sparse

implement to_scipysparse
minor nb changes