Updated Podfile to have AFNetworking 2
Updated CMWebService to use the updated AFNetworking operations.
Fixed a double slash in URL.
Added a comment and reformatted a line of code.
Added Payment service to CloudMine.h
Updated description on CMUser to not count methods in the properties, as this will break on iOS 8.
Updated description on CMObject for the same reason.
Added in explicit response/request serializers with AFNetworking 2.
Also set a non JSON response serializer on binary requests.
Updated CloudMine to AFNetworking 2
Added in a new test to ensure the failure callback in payment service works.