Allow acceptance criteria to be part of the existing TFS integration Merged

It would be very useful for product owners to be able to record acceptance criteria within a field in aha, that would be able to update the linked TFS record and Vice Versa. This seems to be one of the main criteria that is missing from the current TFS integration. 

Obviously the acceptance criteria can just be added in TFS manually but this is a step that should not be needed, The integration should allow product owners to keep all data within aha as well as TFS