Log Message:
0.5.2 (2014-07-31)
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- Changed travis config to use miniconda for faster testing.
- Added wheel configuration to setup.cfg.
- Ensure resource streams are closed after reading.
- Require setuptools.
  (Issue #169)
- Implemented real, imag and T Quantity properties.
  (Issue #171)
- Implemented __int__ and __long__ for Quantity
  (Issue #170)
- Fixed SI prefix error on ureg.convert.
  (Issue #156, thanks jdreaver)
- Fixed parsing of multiparemeter contexts.
  (Issue #174)