Infer class from record in UniquenessValidator
Merge pull request #356 from JohnKellyFerguson/uniqueness-validator

Infer class from record in UniquenessValidator
Added more has_n relationship specs and bump neo4j-core to 3.0.0.alpha.16

Implemented inspect to make PRY happy
Release 3.0.0.alpha.7
Use 2.1.2 Neo4j, since old version can't be downloaded any longer