1.7.0 * Return isNewInstance from upsert (Raymond Feng) * Update rc dep (Raymond Feng) * Return count when updating or deleting models (Simon Ho) * Update README.md (Simon Ho) * Add test running instructions to readme (Simon Ho) * Fix mysql neq for NULL value. (ulion) * replace dataLength instead of adding length property (Partap Davis) * Allow models backed by MySQL to reference mongodb ObjectID (Raymond Feng) * Query string length for schema in characters in addition to bytes (Partap Davis)