Add logout method to OPFAppState.
Add auto-login functionality using NSUserDefaults.
Merge branch 'master' of https://github.com/opfo/app into feature/signup-login

* 'master' of https://github.com/opfo/app:
  Change so we only dismiss search stuff when scrolling down.
  Added StaticDataTableViewController to show/hide static table cells
  Actually re-add the file which was deleted.
  Add assets psd.
  Add dismissal of the search stuff when scrolling.
  Fixed deleted file
  Updated the color of the logourbutton
Merge branch 'feature/signup-login'

* feature/signup-login:
  Add auto-login functionality using NSUserDefaults.
  Change so we only dismiss search stuff when scrolling down.
  Added StaticDataTableViewController to show/hide static table cells
  Actually re-add the file which was deleted.
  Add assets psd.
  Add dismissal of the search stuff when scrolling.
  Add logout method to OPFAppState.
  Fixed deleted file
  Updated the color of the logourbutton