- Control the garbage collection process.

- Finish the binding
	- Search in Model with context (Contains, GetTargetsContext,
	  GetSourcesContext, GetPredicatesContext, see
	  examples/redlandtest.py function testGetsC). 

	- Make Node's == overloaded operator work (see src/Node.cs and example/SimpleGets.cs).

	- Implement Iterator.Contains? (see examples/GetsTest.cs)
	

Comments and questions: Cesar Lopez Nataren (cesar@ciencias.unam.mx).
