AvailableEndpoints

1. / = returns the endpoints available at the root of the API
2. /collections = returns a list of collections in the ldr metadata storage
3. /collections/[collection identifier/sub collection identifier/ sub-sub collection identifier] = returns a list of collections that are part of a particular collection [sub-collection, etc.]
4. /collection/[collection identifier] = returns the endpoints available for a particular collection
5. /collection/[collection identifier]/core = returns the core (metadata) describing a particular intellectual unit
6. /collection/[collection identifier]/proxies = returns a list of proxy identifiers that are available for a particular collection
7. /collection/[collection identifier]/proxies/[proxy identifier] = returns the proxy metadata identified by the proxy identifier that is available for a particular intellectual unit