Optimized image files. Saved 72.80 KB (47.86%)
Unused imports must die. Some formatting.
Fix incorrect casts in gui code.

Caused by removed IInventory implementations.
Changes for 3.7.2 build.
Merge pull request #980 from ZeroLevels/master

Image optimization.
Merge remote-tracking branch 'origin/master' into mc16

Conflicts:
	common/buildcraft/builders/BlockBuilder.java
	common/buildcraft/transport/FallbackWrapper.java
	common/buildcraft/transport/GuiHandler.java
	common/buildcraft/transport/ItemFacade.java
	common/buildcraft/transport/gui/GuiDiamondPipe.java
	common/buildcraft/transport/gui/GuiEmeraldPipe.java
	common/buildcraft/transport/gui/GuiGateInterface.java
	common/buildcraft/transport/pipes/PipePowerWood.java