Nhlscrapi

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* fixed a lot of python3.x compatibility issues

- ``_tools.build_enum`` switch to ``items()`` from ``iteritems()``
- ``print vs`` to ``print()`` in ``scrapr.descparser``
- take out ``maketrans`` in ``scrapr.descparser`` and put in ``replace()``

* fully qualify the ``scrapr.eventparser`` import in ``scrapr.rtss``
* ``Game.plays`` property returns ``self.play_by_play.plays()`` but plays isn't callable

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* dropped urllib2 dependency because it's 2015 and I'm tired of being a dinosaur
* added ``requests`` to setup dependencies
* fully qualified the ``scrapr.NHLCn`` import in ``scrapr.reportloader``
* consolidated cli_opts.py into gamedata.py ... that whole thing needs a rewrite anyway (TODO)

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* setup script reference bug.

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* true bug fix. messed up the pypi upload setup
* forgot cfg et c.

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* refactored ``Plays``/``Strength`` construct

- moved ``Plays`` and ``Strength`` from ``games.plays`` to ``games.playbyplay``
- moved ``scrapr.rtss.playparser.PlayParser`` to ``scrapr.rtss``
- deleted games/plays.py and scrapr/playparser.py
- reworked data structure of ``PlayParser`` to be purely a dict
- parsed play data isn't converted into the proper ``Play`` object until ``games.playbyplay.PlayByPlay`` gets it

* refactored TOI/ShiftSummary construct

- moved ``ShiftSummary`` from ``scrapr.toirep`` to ``games.toi``
- ``scrapr.toirep.TOIRepBase`` now stores by player shift info as dict
- parsed shift summary isn't made into a ``ShiftSummary`` object until in ``TOI``

* Goal of both big refactors was to keep scraping/raw web data as dicts and have object wrappers only exist in the games package
* added a ``unittest`` for the time on ice and shift summary info
* added docstrings to major report and scraper interfaces
* built docs using Sphinx

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* fixed play-by-play bug created when no cum_stats provided
* deprecated extractors
* refactored GameKey and GameType into nhlscrapi.games.game
* updated unittests and README to reflect the refactoring