Upgrade to OrientDB v.1.6.1 with a bit hacking on the OFetchHelper class
improvement on Assets' tests
Better integration with the OrientDB grant/revoke APIs
Manage the new ORecordDuplicatedException exception raised when an Asset already exists
Manage the new ORecordDuplicatedException exception
Merge pull request #143 from giastfader/master

Upgrade to OrientDB 1.6.1