+ Moved DisplaySide, scale_and_shift_point, and set_displayside to utils.py
+ renamed _DisplaySide to DisplaySide
+ renamed _set_displayside to set_displayside
+ updated imports to reflect package rename
+ changed format of imports in __init__.py to be more PEP8-like.
+ updated numpy import exception
+ whitespace cleanups.
+ Renamed demo.__test() to demo._test()
+ Updated __main__ to reflect this change.
+ Renamed BoxPlot to PolyBoxPlot to maintain uniformity
+ Added backwards compat for PolyBoxPlot to __init__.py
+ Updated CHANGELOG.md