Week 6 - Checkpoint: Favoriting
+ Added Email Permissions to Users
+ Updated User model
+ Created Favorite model
+ Updated User and Post model with Favorite dependencies
+ Modified Post Show view
+ Added Favorites controller with create and destroy routes
+ Added Favorites Partial
+ Added Ability to create and destroy favorites to favorite partial
+ Added Authorization to Favoriting fuction, requires membership
+ Created Favorite Mailer
+ Added Anchor to comment partial
+ Created text and html Favorite Mailer views
+ Tested Action Mailer
+ Added callback to Comment creation