Add a build doc command
Remove make_html; use setup.py build_doc instead
Fix comment
Add doc skeleton
Merged 'develop'.
Merged 'develop'.
Update readme:

Add documentation note
Working on the doc
Finish SFML API documentation
Finish PhysFS documentation
Finish Box2D API doc
Doc: add bugs and contribute pages

Add an authors.txt
Add CONTRIBUTE.rst, rename authors.txt
add to manifest
Doc: Add license and credits page
Doc: Add reference examples
Finish doc