Add methods to clear session information (if any).
Send offline_access scope and device name on login
Add refresh token to A0Token.
Parse JWT to retrieve expire date.
Object to store token in keychain.
Parametrize scope using NS_OPTIONS.
Add delegation auth operations.
A0Session class to handle session & refresh.
Fixed issue when storing profile & parsing jwt.

Added info in example apple.
Add ability to save under keychain access group