Made character HUD show pain level instead of actual health.

Pain are calculated based on health, but all damages contribute differently, for example 50u burn will feel like 100u, but 50u poisoning would only feel like 25u.
changelog.html
Merge branch 'dev' of https://github.com/Baystation12/Baystation12 into pain

Conflicts:
	html/changelog.html
Merge pull request #3419 from comma/pain

Pain