New scenario 9: Sister Lands of the North

I added a new scenario. It had an interesting concept that regions 4 and 1 are neighbours during movement if Roadbuilding has been acquired. This update also fixes Scenario 7 so that the Bay of Brine now works. Scenario 7 is really hard one.

Tutorial

You can now play a Tutorial game. Select the first Scenario and click "Play as Tutorial". You will be shown the controls and some basic rules.