Added a Gittip link to the README.
Refactored Neo4djangoRequest to allow arbitrary...

pre- and post- request callbacks.
Added NodeModelTestCase.assertNumRequests to ...

ensure the expected number of REST client requests per test.
Merge branch 'master' of github.com:scholrly/neo4django
Added more information about NodeModelTestCase.
Merge branch 'master' into scholrly

Conflicts:
	neo4django/testutils.py
	reg_settings.py