IMPROVED : Docs Syntax Highlighting

http://documentation-style-guide-sphinx.readthedocs.org/en/latest/style-guide.html#code-blocks
IMPROVED : Docs Syntax Highlighting
IMPROVED : Docs Syntax Highlighting
IMPROVED : Docs Syntax Highlighting
IMPROVED : Docs Syntax Highlighting
#82 : Add table of features
#82 : Fixed some errors for the PDF Generation
Update .gitignore to test workaround for RTFD

Add _build to .gitignore as per rtfd/readthedocs.org#665