Correct name of Python config file
Correct formatting in Mac Installation section

Fixes errors in PDF Build
- Chapter 2: Overfull \hbox (10.19957pt too wide) in paragraph at lines 274--277
- Environment Standard Error: /var/build/user_builds/testgitext/checkouts/latest/source/getting_started.rst:56: ERROR: Unexpected indentation.
Remove indexing statements

Generating an index is not working on HTML or PDF generation on readthedocs.org.
Change table formatting and filename so PNG is displayed

Fixes errors in PDF Build
- Chapter 16: Underfull \hbox (badness 10000) in paragraph at lines 1705--1706
- Chapter 16: ! LaTeX Error: Unknown graphics extension: .43.png.