SAK-24180

Add the notion of ProxyBindings to the service and endpoints.
Change the format of the top-level REST endpoint to 
include consumerkey.



git-svn-id: https://source.sakaiproject.org/svn/basiclti/branches/BLTI-230@131092 66ffb92e-73f9-0310-93c1-f5514f145a0a