-- Registry
-* refactor to use managers
-* update call should attempt to push updates to federated peers if
- the peer has a record for an object that is updated locally
-* api.update_membership() shoudl behave more like resolve when looking up records (attempt to resolve records at federated registeries) instead of only looking in the local registry
-* sfi remove, if removing a site, remove any record that site is an an authority for
-* support generic registry records (dont depend on postgres! object db?)
-* modify resolve() so that you can resolve more than 1 hrn at at time (list of hrns)