Swimlane

- Updated `copy_field_values` to return a list of values added to destination field.

- Adding `save` method to `Record` objects, deprecating `insert` and `update` methods.
- Updating `restrict` method on `Record` objects to use the restrict endpoint and also accept an `append=True` argument to append to existing restrictions instead of overwriting them.
- Adding `copy_field_values` utility function to copy values from one valuesList to another.

- Added `restrict` method to `Record` objects to restrict access to users/groups for a record.
- Added `save` method to `App` objects.
- Fixed `find_all` methods for `Group` and `User` objects.

Added

New recipe (`swimlane.records.add_references`) for finding records by query and adding them as references to a particular field (this can be done within the same App or across two different Apps).