[Feature] Ketchup as fake blood

[ZeWaka]

When you get more than 5u of ketchup on the ground, you get 'blood' that's actually ketchup.
It's slightly brighter and has an obvious examinetext. It also clogs the extinguisher if you try to spray it.

Idea from: http://forum.ss13.co/showthread.php?tid=5949

Branch compare, Patches 1,2, and 3 (oops)