lib/recommendable/orm/mongo_mapper.rb
require 'mongo_mapper'
MongoMapper::Document.plugin(Recommendable::Rater)
MongoMapper::Document.plugin(Recommendable::Ratable)
MongoMapper::EmbeddedDocument.plugin(Recommendable::Rater)
MongoMapper::EmbeddedDocument.plugin(Recommendable::Ratable)
Recommendable.configure { |config| config.orm = :mongo_mapper }