2.10.1

- More test coverage!
- Fix ``search_gen``, fixes #200 
- Fixed ``get_lastfunction_header`` to actually do what its docstring says, returns ``None`` if header is not found, fixes #205 
- Updated some internal API code, ``__init__`` didn't need to have ``self.auth`` and ``self.headers`` because they were never used anywhere else but the ``__init__``
- Added ``disconnect`` method to ``TwythonStreamer``, allowing users to disconnect as they desire
- Updated ``TwythonStreamError`` docstring, also allow importing it from ``twython``
- No longer raise ``TwythonStreamError`` when stream line can't be decoded. Instead, sends signal to ``TwythonStreamer.on_error``
- Allow for (int, long, float) params to be passed to Twython Twitter API functions in Python 2, and (int, float) in Python 3

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