Merge pull request #15 from denibertovic/develop

Add caching support and a few docs fixes
Bumping stormpath to the latest release.
Trying italics.
Revert "Trying italics."

This reverts commit 1314f416b52e37e0c8b652699fa72b285b81768c.
Cleaning up cache docs.
Updating changelog.
Version bump.
add new social auth backend
small unicode fix
add support for social login

Added support for Google, Linkedin, Facebook, Github.
Add management command for creating directories for social login

This is useful if the user is using ID site because just creating the
directory will automatically add the social buttons to the default login
pages.
add initial docs for social login
Merge branch 'develop' of https://github.com/stormpath/stormpath-django into develop
small readme fix