httpstream prep and bindable classes
Node base replaced
Entity -> _Entity
Merge branch 'master' into feature/bindable

Conflicts:
	py2neo/neo4j.py
hydrate/stale
Rel
moved legacy index functionality to legacy package
more repackaging
__new__ and ServiceRoot bases
Graph base to Bindable
todo
a few tweaks
tests fixed so far!
another test module fixed
fixed neo4j_test.py
fixed cypher_test.py
fixed geoff_xml and ogm tests
fixed index_test
removed _Entity
Node switch to LegacyNode