Tweaks for spam #2

Added brackets surrounding tokens to make whitespace and empty tokens
removable.
Slightly modified ion storm behavior.
Increased duration required to stop spam to 5 minutes.
Added ability to expand spam filter limit with installation of message
monitor circuits.
People will see why their message been discarded.
Discarded messages will be highlighted with red color in message log.
C02 -> carbon_dioxide

Renamed carbon dioxide breathing type string to hopefully prevent
confusion in the future.
Merge pull request #5083 from mwerezak/co2

New System for CO2 Asphixyation
Fix

No everlasting events.
Before detonation, supermatter pulls all objects, including anchored objects in a 13-tile radius (just enough to cover the control room) towards it for 10 seconds. Windows within this radius are immediately shattered.

Supermatter no longer pushed around by airflow.
Unanchored objects and players without magboots are pulled twice as fast towards the supermatter.
Supermatter shards have a smaller pull-radius.

Leftover variable removed.
Vending machines can now be unanchored
Adds ability to have airlock wires randomized

Adds a secured_wires var to airlocks that may be set through mapping. If
not set to 0, the airlock's wires will be randomized for that airlock,
instead of using the global wiring scheme.
Bolt dropping wire, please
Merge pull request #5094 from Baystation12/dev-freeze

Dev freeze --> Master
airalarm exploit fixes

airalarm had various checks missing, e.g. making sure the AA
was unlocked before triggering panicsyphon and the like.

added proper rangecheck, added var checks for the different types of calls.

also replaced usr.machine = src with usr.set_machine(src) so the
window updates properly for silicon mobs using the machine from afar.

i had no time to look for functionality exploits, this commit merely makes sure
the commands can only be called in proper circumstances.
Adds secure airlock electronics

Also, secured_wires can be set through the airlock constructor.
Fixes accidental copypasta
Custom item for YankeeSamurai: Hal Ishimaru
Makes it harder to accidentally undress yourself
Cleaner implementation of secure electronics
Merge branch 'vending-anchor' into small-changes
Removes awful double wall from maintenance

Removes the awful looking double wall from the maintenance tunnel
between medical and engineering.
Merge branch 'double-wall' into small-changes