Simplify docs/conf.py
Helpful sidebar
Copy/move a bunch of README content to the doc site
Clarify contributor updates
Remove PIL porting guide from Readme
Fix some readme formatting
Bump required pillow version in docs/requirements.txt
Link to PyPI from index.rst; formatting fixes
Add global ToC back to index page
Add myself to CONTRIBUTORS.rst
Link to Github
Merge pull request #371 from irskep/doc-improvements

Move or copy a bunch of content from README.rst to docs/