Thread-safe Neo4j.start
Merge pull request #23 from dwbutler/thread_safe_start

Thread-safe Neo4j.start
Fixes "NoMethodError: undefined method `join' for #<Set..." error 

Currently throws a Fixes "NoMethodError: undefined method `join' for #<Set...".
Merge pull request #24 from aishfenton/patch-1

Fixes "NoMethodError: undefined method `join' for #<Set..." error
Add support for Relationship#nodes accessor