Support URI object as a value type of self / href
LIVEOAK-397 Postgres resource
 - Fix item update using PUT
LIVEOAK-397 Postgres resource
 - License headers
LIVEOAK-397 Postgres resource
 - Improved error reporting
LIVEOAK-397 Postgres Resource
 - Readme, and Developer's Guide documentation
Merge pull request #296 from mstruk/master

Postgres resource refinements and documentation