#Twitter client with offline mode.
- As a user I can login to Twitter
- As a user I see my twitter name in the navigation bar
- As a user I can view my Twitter feed (fail plan: display error)
- As a user I can refresh my feed using pull-to-refresh (fail plan: display error)
- As a user I can view my Twitter feed without internet connection
- As a user I expect that feed will be automatically updated when network connection is available
- As a user I can tap on system compose button on the right of navigation bar and get to post new tweet screen
- As a user I can post new tweet (fail plan: display error)