Rebalance ethanol's liver damage

[kyle2143]

I might be adjusting the way damage is dealt over the next few days to fine tune it so let me know if things feel off, but I think I have a decent and simple way to make liver damage to ethanol better so that it's less oppressive at lower amounts. Here is how it worked previously:

- no damage if under 25u of ethanol
- 0.25 damage if under 55u
- 1 damage if over 55u
- on overdose (100u) 50% randomly 1-3 damage to any of all of liver/kidneys each at 30% chance to hit.

* Note that the damage values here are for Liver damage, not tox damage dealt to the human.
** Those amounts of units were not really chosen by me, but they are sort of the values for drunkenness level that have always existed.

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And here is going to be the altered formula (changes are bolded):

- no damage if under 25u of ethanol
- 0.15 damage if under 55u @ a rate of (amt/2)% per tick *
- 0.4 damage if over 55u @ a rate of (amt/2)% per tick
- on overdose (100u) 50% randomly 1-3 damage to organs Liver(10%), l_kidney(15%), r_kidney(35%).

* This means that if you have 40u of ethanol, then it would have a 20% chance to do 0.25 damage each tick.

The favoring of damage to one kidney over the other is to make corrective surgery a bit less of a hassle because you'll sort of get advanced warning of an issue with kidney failure because one will be giving you problems first, giving you more time to get to medical.