Updated Medable SDK.
- Medable:
Removed delete account from Medable screen.
Listening to login / logout notifications to enable / disable "Account" option in Medable screen.
- Medable
Add "Cancel" option for the login dialog.
- Medable:
Try to recover the session when the app goes back to foreground.
Removed deleteMedableAccount method.
Merge branch 'master' of github.com:jqgregory777/BioGram2-iOS

Conflicts:
	Biogram2-iOS/CBCMedableViewAccountController.m