Clean up README
Each of these "READ" endpoints should "autocommit", which prevents transaction abort issues (atleast with postgres).

If you got an error, (i.e. negative limit is bad), then PG will barf always.
current transaction is aborted, commands ignored until end of transaction block
Support limit/offset paging of Collections and Collection.Items

new method: Collection[] Collection.findAll(limit, offset)
new method: ItemIteractor Collection.getItems(limit, offset)
Add REST support for limit / offset to page through comm.collections and collection.items, and item list
Clean up Collection, Community, Item regarding getting to parent and expand
Item metadata is array of MetadataEntry, not wrapped in a metadata wrapper.
Add expands for Bitstream, to get to its parentDSO

Note: ParentDSO is either Item or Comm/Coll as logo