Pynlpir

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* Adds 2015-08-05 license file. Fixes 31.

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* Fixes RST rendering error.

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* Includes NLPIR version 20150702. Fixes 25.
* Adds encoding error handling scheme options.
* Adds new word identification functions and documentation. Fixes 26.
* Makes ``~pynlpir.get_key_words`` work with multiple NLPIR return value
structures. Fixes 23.
* Returns ``None`` when pos code not recognized. Fixes 20.
* Updates outdated link in tutorial. Fixes 21.

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* Fixes release problem with v0.2.1.

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* Packages NLPIR version 20141230. Fixes 18.

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* Packages NLPIR version 20140926. Restores ``pynlpir.get_key_words`` functionality. Fixes 11, 14, and 15.
* Updates part of speech map for new NLPIR version. Fixes 17.
* Fixes a typo in ``api.rst``. Fixes 16.
* Fixes a bug involving uppercase part of speech codes. Fixes 10.
* Adds Python 3.4 test to tox and travis.
* Notes Python 3.4 support in ``setup.py`` and ``CONTRIBUTING.rst``.
* Fixes the doubleslash unit test so that it works with the new NLPIR version.
* Adds a missing comma. Fixes 8.
* Fixes indentation in ``pynlpir.get_key_words``.
* Adds condition for empty key word result. Fixes 9.