Adds photocopier based faxmachine, removes redundant photocopier vars
Merge remote-tracking branch 'upstream/dev' into faxmachine
Removes excessively spammy admin log messages
Fixes duplicate antag radio messages
Water cools hot turfs even if they do not have a hotspot.

Also adjusts fire extinguisher volumes to correspond to the new beaker
volumes, and scales things accordingly.
Bring back needed code
Fixes emergency shield generators running with no power.
Destroyed emergency shield generators no longer just disappear silently.
Merge pull request #6842 from Hubblenaut/master

Fixes duplicate antag radio messages
Merge pull request #6840 from Ravensdale/master

Removes excessively spammy admin log messages
Fixes #6868

See https://github.com/Baystation12/Baystation12/issues/6868#issuecomment-60784011
Fixes #6864.

Fix confirmed to not runtime and still causing sparks if a metallic object past through.
Agree with mwerezak that this being necessary is a bit bothersome.
Fixes #6871. Fixes #6821.

Amended to match the formatting in #6846, to hopefully avoid merge issues.
Removes world print, re-adds react() call

Also removes checks for if(W.reagent) in extinguisher code, as that is
being handled separately.
Merge pull request #6854 from mwerezak/shieldgen

Fixes emergency shield generators running with no power.
Merge pull request #6870 from PsiOmegaDelta/Diona

Fixes #6868
Fixes #6879

Should've guessed there were more of those jackers hiding in the code.
Adds sanity check for the mecha fire extingusher as well. Would rather remake it to be based on the standard extinguisher code but that's a dev project.
Area-based Jukebox

A jukebox which alters the ambient sound in the current area and plays it with 100% probability.
Leaving the area stops the ambient sound.
Entering the area resumes playing the ambient sound.
Ports more of /tg/'s powernet code.

Among other things this fixes a a bug where SMES would draw excess power from the powergrid they were outputting to, rather than drawing from.