Entity->_setId() and Entity->_getId() no longer use the entity getters but rather return the raw values.
Namespace/import tweak.
It is now possible to set the ID property on the repository by calling Repository->setIdProperty('_id');
Changed StoreInterface in order to standardize how store settings are passed into the store.
Also created a Store->didBindToRepository() function to be used as a callback.
Adjusted MySQL store to the new interface.
Repositories now call Store->didBindToRepository($this) upon creation.
Adjusted MongoDBStore to new interface. WIP.
Added PHP-RQL to dependencies for future use in potential RethinkDB Store.