Clean up for 0.2.0 release.

- relative imports
- readme updates
- manifest.in
Moved version into init file and set all dependencies to greater or equal to.
Made docs reflect current version.
Relaxed dependency requirements some.
Added readme to sphinx docs.
Fixed some sphinx errors.
More doc fixes.
Got rid of autosummary warnings.
Added middle initial to docs.
Added vagrant testing config files.
Bumped version, removed requirements files, added pip instructions.