Add `insert` alias for `add` method.
Add `insertAll` alias for `addAll`.
Add `selectInsert` alias for `selectAdd`.
Add `update` alias for `save`.
Add `updateField` alias for `saveField`.
Add `updateInc` alias for `saveInc`.
Add `updateDec` alias for `saveDec` method.
Add `remove`, `destroy` alias for `delete`.
Add `scope` method for Model.