Add documentation

Remove unused GiST index

Add an atomic save function and simplify save API

Add an example project and app

Implement minor fixes from code review

Use signals when initializing the state

Merge pull request #1 from CloverHealth/fix-temporal-options-typing

Merge pull request #3 from CloverHealth/travis

Set up Travis CI

Fix typing of temporal_options (it's a class var, not an instance var)

Initial commit