Refs #49. Added development guide
Refs #49. Use consistent headers
Refs #49. Farmed out to _quickstart so I can include that elsewhere without the header
Refs #49. Converted to notes
Refs #49. Added the user guide
Refs #49. Removed deprecated documentation
Refs #49. Converted to restructured text
Refs #49. Removed requirements.txt
Refs #49. Added requirements
Refs #49. Use the README now for pypi's long description
Refs #49. Updated docs build to use sphinx-build instead of make html
Refs #49. Ignore restructured text files that start with _ when building table of contents