Move to relationship_manager
Abstract out common stuff
Clean up
Draft rel class
Rename to property manager
Merge branch 'master' into feature_relationship_models

Conflicts:
	neomodel/core.py
	neomodel/relationship.py
	neomodel/traversal.py
Move PropertyManager
Merge branch 'master' into feature_relationship_models

Conflicts:
	neomodel/relationship.py
Relationship property support - work in progress
Finalise connect mechanism
Provide proper deflate support
Remove dead code
Fix for property manager changes
Deflate values in where clause
Make datetimes store as a float for higher res
Add cypher debug logging
StructuredRels and traversal
Added notes about env vars
Merge branch 'master' into feature_relationship_models

Conflicts:
	neomodel/relationship.py
Update changelog