Changes

Removed context setting from the Query/Statement API (it did not have
any influence anyway). Extracted common behaviour of QueryImpl and
TypedQueryImpl into a common superclass.
 (commit: 51f531e)

Added possibility to specify a descriptor for results in TypedQuery.
Tested it.
 (commit: 6fd300f)

Removed println.
 (commit: b0cc7b1)

Working on the new strategy of tracking unpersisted changes during
transaction.
 (commit: 684087c)

Processing pending references for OP sets.
 (commit: 9cb4f6d)

Remove pending assertion when the target is persisted.
 (commit: 47815a6)

Handle pending assertion context. Fixed some tests.
 (commit: 018f976)

Removed the obsolete persist reference resolver.
 (commit: 25c1484)

Remove pending assertion when the persisted instance is removed before
transaction commits.
 (commit: 89ddbf5)

Remove pending assertion when the pending value is replaced during
transaction.
 (commit: 12b0a6c)

Unified postCommit and clear in UnitOfWork.
 (commit: 31e19da)

Working on improving merge behavior.
 (commit: c82b85b)

Updated README with info about some related libraries.
 (commit: 51cbcf7)

Removed the old CascadeResolver.
 (commit: 04a4fff)

Handle new instance reference persist in lists.
 (commit: 37cb24a)

Handle removal of pending references to list items.
 (commit: 0b3fd0e)

Working on more robust merge semantics (merge instance into PC which
already contains the same individual).
 (commit: df129e6)

Additional testing of merge semantics. Updated TODOs.
 (commit: 7407c52)

Use credentials when connecting to remote RDF4J repository (when
supplied). Moved username and password configuration constants to
OntoDriverProperties.
 (commit: cbe6b0b)

[0.9.9] Bumped version and updated release notes. Updated license
headers.
 (commit: 1e6f9ef)