Fixed Gas Mask OP-ness, added config option to let creative mode override the Electric Chest, fixed Gas Generator crash
Merge branch 'development' into 1.8

Conflicts:
	src/main/java/mekanism/client/ClientTickHandler.java
	src/main/java/mekanism/common/CommonProxy.java
	src/main/java/mekanism/common/Mekanism.java