Update to iOS 7 and AFNetworking 2.0. Remove AFOAuth2
Enable login button when user and password is present
formatting
Start edit user refactor
remove nibs
add logout functionality
Clear fields on logout
Update readme.md

Remove portions that mention AFOAuth2, add new screenshot with iOS7, and updated code to reflect changes in the example application.
Merge pull request #2 from dtykocki/master

Update iOS example application