Added hardcoded behaviour for buy resource
Merge branch 'master' of https://github.com/lazcatluc/power-grid

Conflicts:
	src/main/java/ro/powergrid/plant/PowerPlant.java
	src/test/java/ro/game/BuyResourceTests.java
Fixed resourceToBuyType and resourceToBuyQuantity fields
Merge branch 'master' of https://github.com/lazcatluc/power-grid