Added in gradual damage linked to Oxy

- When above 50 Oxy Damage or when crit, patients will start developping
brute damage both in internal organs and external organs (makes natural
regeneration recovery much harder)
- Example of damage after patient was left to suffocate from -105 to
death (Patient was bludgeoned a few times in arm for testing) :
http://i.imgur.com/boID25E.png
- This change is supposed to make defib revival a bit harder on patients
who have mostly died out of oxy damage
- Status dregades much slower with Inaprov, but still degrades