Removes excessively spammy admin log messages
Fixes duplicate antag radio messages
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.
Merge pull request #6854 from mwerezak/shieldgen

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

Fixes #6868
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.
Merge pull request #6872 from PsiOmegaDelta/Electro

Fixes #6864.
Merge pull request #6873 from PsiOmegaDelta/Extinguish

Fixes #6871
Merge branch 'master' of https://github.com/Baystation12/Baystation12

Conflicts:
	code/modules/shieldgen/emergency_shield.dm
	maps/tgstation2.dmm