Added a Relationships model
Added debugger gem
db: projects.finishes_at to projects.completed_at
Created Relationships

A relationship keeps track of which projects a user watches.

• Relationship model added
• Relationship controller added, allows create and destroy actions
• Relationship routes added
Added home feed route
Added comments to api_controller
Modifications for PublicActivity in api_controller

• Added PublicActivity’s StoreController
• Made current_user a public (hidden) helper method
Modifications to Checkin model

• Stopped tracking all activity
• Delegating the user through the project
• Defined JSON serialization method
Added method to User to find projects they watch
Create activity when a checkin has been saved
Fixing HTTP status codes
Implemented Home Feed
Changed instances of star to watch
Changed access token expiration time
Merge branch 'feed'

* feed:
  Changed access token expiration time
  Changed instances of star to watch
  Implemented Home Feed
  Fixing HTTP status codes
  Create activity when a checkin has been saved
  Added method to User to find projects they watch
  Modifications to Checkin model
  Modifications for PublicActivity in api_controller
  Added comments to api_controller
  Added home feed route
  Created Relationships
  db: projects.finishes_at to projects.completed_at
  Added debugger gem
  Added a Relationships model