Nerfs external blood loss, slays relative pathing

Created by: 9600bauds

External blood loss has been slowed by 25%, though you'll still lose roughly the same amount of blood.

Lying down will reduce the amount of blood you lose from external bleeding by 30% (This goes a longer way than it sounds). If you can't stop the bleeding, your best bet is to lie down and call for help or have someone drag you.

Tweaked low blood level warnings to give a little of a warning transition between "mostly fine" and "going into shock".

Slightly tweaked the effect of low blood levels, previously medium blood loss would be deadlier than heavy blood loss. It will still kill you pretty dead.

Github is shit at diffs, here are the 2 lines I changed in wounds.dm in a non-shit presentation: http://i.imgur.com/YCQ84tc.png http://i.imgur.com/qwCzHlQ.png