Better template tags for most common cases.
Merge pull request #14 from matagus/more-templatetags

Better template tags for most common cases
Refactoring add_or_remove view to use manager querysets.
Merge pull request #15 from matagus/fix-manager

Refactoring add_or_remove view to use manager querysets.
Updating README file to explaing how to install and use django-favit app.
Merge pull request #16 from matagus/readme-update

Updating README file to explaing how to install and use django-favit app
Bugfix: cast obj_id to int when getting object from request
Fix FavoriteManager.create method