Refractored SQL classes + SQLite Connector + Model->fetch

MySQL class was refracotred SQL class was created as a result
SQLite connection now is available to use by DB::add(new alchemy\storage\db\connection\SQLite()) which takes one parameter (db file path)

Model->fetch
takes one parameter - an array with new values for model properties you can also create new model and fetch it on instantiation via new Model(array $data)
Model->fetch