Fix being able to apply lipstick through masks and items covering the mouth.
Fixes conveyor switches not having fingerprints. Simplifying the conveyor switch code a bit.
derp
Merge remote-tracking branch 'phil235/ConveyorSwitchPrintsFix' into spacefactory13

Conflicts:
	code/modules/recycling/conveyor2.dm
Constructable conveyors: Corner belts, fingerprint fixes