Update 0.919

Added ability to assign tamed animals as pets (select through main colonist tab).
Pets will follow colonists around and slightly improve colonist mood.
Effect increases as colonist spends more time with pet.
(Experimental, might be removed)Colonists will ride larger pets into battle if a pet is assigned to them. Not sure if this is too janky to keep.
Added option in order items panel to restrict order to a single colonist and/or workshop.
New particle effects.
Fixed some item positioning.
Basic furnace is now larger and scaled correctly.
Reduced non-player character AI job update rate.