Simplified API
Path append/prepend/__add__/__radd__
Merge branch 'release/2.0.1' into feature/auth

Conflicts:
	py2neo/core.py
Import tweak
Familiarity and resource equality.
Merge branch 'release/2.0.1' into feature/auth

Conflicts:
	py2neo/__init__.py
	py2neo/core.py