- Implemented unit test.

- Created dummy options/params/results for more realistic testing.

- Includes tests.

- Began test suite.

- Added QR code test
- Adjusted QR code loader to use more consistent public interface

- Includes tests.

- Began framing out unit tests.

Rewrite of MultiBackend driver with separate functions for all ILS driver methods. Fix to checkCapability to work properly with drivers using __call() magic method and more data to supportsMethod() for better decision-making including the possibility to use supportsMethod also without _call(). Updated MultiBackend tests.