UP: Protected the docx import
add parallel-apply functionality using both threads and processes.  move the basic .to_vw method in streamers to use this method
flush stream in output worker
cleanup of to_vw
fixed to_vw in stream tests
a few more cleanups
remove threading reference in streamers
simplify the parallel apply function in the case when n_jobs = 1
UP: Protect the MySQLdb import.
Merge pull request #27 from columbia-applied-data-science/protected-import

UP: Protected the docx import
Merge pull request #29 from mdeland/stream_parallel

Parallel apply
Skip mysql tests if mysql not importable
Merge pull request #30 from ApproximateIdentity/protected-import

Protected import
setup versioned
brightalk nb
updates to brightalk nb
make a dictionary of tokens during initialization of LDAResults, use during predict() for 5x speedup
renamed 'cmd' module to 'cmdutils' to avoid module name conflict with native python 'cmd'.
The conflict was preventing yum from working on EC2
changed LDAResults.tokens to _tokens and added _tokenset to LDAResults.  Using properties and setters to bind changes in tokens to tokenset.
simplified API: changed _tokenset to tokenset and removed xtra tokenset method