[B19] Field Medic V1.1

For Rimworld B19

1. Nerfed stabilization by reducing the effectiveness (bleeding reduction rate). High level doctors (10+) can still fully suppress bleeding, but the overflown effectiveness is reduced, too.
2. Made the bleeding resume rate (the speed for bleeding rate to increase from bleeding at whatever percentage of the original back to original) slower.
   (The combined effect is, your new starting bleeding rate is higher, but you spend more time at low bleeding rate before return to full bleeding)
3. Variable medic bag durability cost. It now may cost between 3-8% of the bag HP to stabilize one bleeding, depending of the original bleeding rate.
4. Lowered the natural deterioration rate.