Add support for the PV protein renderer
Fix setup
Misc bug fixes - tabular, ipynb
Fix docx/unicode encoding error
Update documentation
Update documentation
Update documentation
Merge pull request #118 from mfraezz/features/pv

* Purpose
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The GLmol protein renderer had limited functionality, being able to properly render approximately one third of all test files. PV performs better but still can't render amino acids.

* Changes
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Make PV the default pdb renderer
Improve Documentation

* Side Effects
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Some minor bug fixes, including a check that will prevent UnicodeEncodeErrors when rendering .docx's.