api end point to retrieve list of connections

Views should never make queries. That's why we've got the model Mgr classes. We should have a SocialMgr or something that performs the query based on arguments passed into it from the View. The manager then returns the data just via casting to a dict. See things like https://github.com/bookieio/Bookie/blob/develop/bookie/views/api.py#L135 for an example of using a manager to get data and then building the response.