Merge branch 'ai' of https://github.com/samm81/2LoavesOfBread into ai

Conflicts:
	src/core/Runner.java
	src/core/actors/Actor.java
Testing with TestActor

Testing
Exchange Rates work with Supply AND Demand

Still a bit hanky: Offers are being made, but nobody will take the
watermelon.
Conflicts:
	src/core/actors/Merchant.java > Changed the starting stuff I think
Exchange Rate Fiddling

Exchange Rate
Merge of ai into events