move the Facebook logic to viewWillAppear for better UI consistency
Localize the settings view
clean up authentication in the BGTSocket class
partially implement authentication in the settings dialog
implementing login in the settings dialog
adopt the gui of the settings screen to properly reflect the new multi-login
adding a settings icon
no need to set the title any more now
add a view controller to register new users
complete the registration UI; add a settings icon to the title bar
implement user input check
implement the signup process (including error message on failure)