Adds a fairly simple system that allows adjusting various numbers like max health, incoming damage, outgoing melee damage, etc. The nice part is that changing certain variables this way (like max health) is a lot safer than manually setting the max health var directly.
Changes a lot of short lines of code to point towards a variable's getter or setter helper instead of reading the var directly so the modifiers can work.
Endoarmor, delayed toxin sting, Enfeebling sting, and recursive adrenaline overdose now use the modifier system.
Enfeebling sting now only lasts two minutes, from five minutes, however it now also reduces the victim's melee damage by 25%/50%, and increases the damage they suffer by 10%/35%, for normal and recursive respectively.
Delayed Toxin Sting's effects are now felt all at once instead of over the course of a few minutes.
A lot of new defines are now in inventory_sizes.dm, which contains;
All the size identifiers (the thing that tells the game if something is bulky, or w/e).
Storage costs for all the sizes, which are exponents of two, as previously.
A few constants for inventory size.
Also changes all storage item's capacity definitions by basing it off of how many 'normal slots' exist for it. This allows one to change the definition for all of the defines in the file, and everything will follow along without needing to change 500 files. In testing, I made all ITEMSIZE_COST_* defines doubled, and nothing had broke.
The benefit of doing all of this is that it makes adding new weight classes in the future much simpler, and makes knowing how much space a container has easier, as seeing ITEMSIZE_COST_NORMAL * 7 means it can hold seven normal items.
``/mob/dead/observer`` -> ``/mob/observer/dead``
``/mob/eye`` -> ``/mob/observer/eye``
Reason being that they are similar in that they both don't interact with
the world in any way. Some procs were shared, some checks as well, and
it overall makes more sense this way. Plus, there were no ``/mob/dead``
mobs.
The wizard den is no longer pitch black.
Fixes targeted spells using the wrong caster/source.
Adds some missing checks using the caster source above.
Re-logging should no longer cause a loss of spell UI icons.
Mind transfer should no longer cause unintended spell loss.
