Clean up whitespace.
Reindent to 4.
Inline helper methods.  Switch off index safeties.
Update docs.
Refactor DTW to use iteration / function call.
Show how to implement fan.  Cleanup.
Clean up setup.py.
Rename pyDTW to dtw.
Merge pull request #2 from stefanv/iterative_dtw

Change DTW to be iterative.