Support for restricted profiles

Restricted profiles on Android 4.3 or later are not able to create their own accounts. The only options are to allow access to the accounts created by unrestricted users, blocking certain features of the app or disable RedReader completely on restricted profiles. 
Since the first option is bad for the privacy of the user and disabled RedReader completely is not necessary I tried to hide all options which require a reddit account and the option to manage accounts in restricted profiles. In that way it behaves like an anonymous read-only client in order to prevent a possible crash due to missing permissions and repeating prompts to login.
Maybe it would be a good idea to display a message at first startup in restricted profiles to inform the user about the read-only nature of RedReader.