Configure REST API logging

dryad-rest-api.log for general INFO logging
dryad-rest-api-objects.log for logging of object create/delete/update

The object log will be useful during downtimes to capture any API calls received by the failover server that need to be played back on the production server.

Fixes [Trello 281](https://trello.com/c/3RDxHYwI)