Fixes #5915

Also allows checking remaining engine charge by examining, and removes
the verb.
meter improvements

- can unwrench meters now without needing to unwrench the pipe beneath
- AIs and ghosts can still click to examine
- other mobs don't read meter instead of doing whatever it is they are clicking for, e.g. shooting a gun
- 3 tile range check for non-AI/ghost still in place
- added feedback when no power or broken
fixes tele-comp not checking power on initialize()

prevents exploiting the computer back on while area power is off
fixes #5934
capsaicin and condensedcapsaicin changes

turns them into pain dealing reagents instead of burndamage dealing
feedback change on meter improvements

thanks @comma
Merge pull request #5924 from mwerezak/train

Fixes #5915
Merge pull request #5937 from Walter0o/patch-4

capsaicin and condensedcapsaicin changes
Merge pull request #5933 from Walter0o/patch-2

meter improvements
Fixes runtime in train/explode()
Summon cultist and free cultists runes now give cultists less damage

Damage scales downward with each additional cultists around the rune.

No more automatic 15 damage for freedom then 25 for summoning even if you have 8 cultists helping with the ritual.
Merge pull request #5941 from Whitellama/master

Fixes #5577, Dionaea crashing on death. Fixes #5838, tomes not being able to be stored on bookshelves."
Merge pull request #5948 from mwerezak/train

Fixes runtime in train/explode()
Merge pull request #5936 from Walter0o/patch-3

fixes #5934 and teleport comp fix
Merge pull request #5949 from Ccomp5950/cult-tele

Summon cultist and free cultists runes now give cultists less damage
fixes #5923

and a few other range issues
fixes #5919 and some other reagent value issues

negative values everywhere.
removes pointless has_reagent() checks

remove_reagent() iterates safely through the holder list already,
unless you need to check a minimum amount,
or simply want to know if it is present, the call is not needed.
Merge pull request #5951 from Walter0o/diona_range

fixes #5923
typo fix