Revert recent change (e4edc9c2) for using getPrimaryKey() instead of using a keyed array for queries
Improve method documentation of return values
Remove requirement for EMongoDocument child classes to override model(); requires PHP 5.3+
Register MongoDb alias in Yii to allow intra-prackage references. Override 'unique' rules in EMongoDocument to use EMongoUniqueValidator over the default CActiveRecord implementation.