Refactor schema so that it registers relations via repositories
Introduce Environment#schema
Memoize schema in environment
Introduce Environment#mapping
Update docs
Allow calling Environment#schema multiple times
Update flay threshold
Add docs for Environment#mapping
Use Adamantium in Mapping and Schema
Rename Environment#register => Environment#[]=
Simplify spec
Rename Repository#get => Repository#[]
Rename Repository#register => Repository#[]=
Simplify Environment#schema
Merge pull request #62 from rom-rb/adapter-relations-in-schema

Adapter relations in schema