Quick fix for engine core flow imbalance

A more thorough fix should probably involve providing a way for players
to control the flow rate.

Also tweaks emitters and allows collectors to be read using a multitool.
Removed debug statements
Allows power to be read by examining the collectors
Fixes #6118
Adds ChessPiece's species hardsuit sprites

Adds ChessPiece's onmob and inventory sprites for unathi and skrell hardsuits, as well as nicer tajaran hardsuit inventory sprites to replace the current placeholder ones. Adds hardsuit spritesheet entries for unathi (skrell will come later).
Merge pull request #6168 from Kelenius/OfCablesAndStacks

Cables are now stacks
Merge pull request #6153 from PsiOmegaDelta/AtmosList

Central Atmospherics Computer - Air alarm sub-list
Merge pull request #6157 from Raptor1628/dev-freeze

Area Fixes
Merge pull request #6173 from GinjaNinja32/nodebug

Removed debug statements for ioned SMESes
Making sec huds more fault tolerant. A number of sources never set id.rank, only id.assignment.
Merge remote-tracking branch 'upstream/dev' into StatusDisplay

conflicts:
	maps/tgstation2.dmm
Fixes an issue where toggling camera lights would disconnect the AI from an active holopad while keeping the pad online.
Merge pull request #6169 from PsiOmegaDelta/StatusDisplay

Status display - Station time
Merge pull request #6167 from PsiOmegaDelta/PDATime

PDA - Examination now offers station time
Merge pull request #6175 from mwerezak/master-fixes

Fixes #6118
Merge pull request #6177 from mwerezak/species-suits

Adds ChessPiece's species hardsuit sprites
Added curatins.
Opaque non-dense structures.
Cleaned up holodeck controller a little.
Now it uses global list of holdeck programs available instead of hardcoding them into interface.
Console can be set to have only some of those programs.
Fixed copypaste derp resulting in runtime when you are naked sans gloves.
Merge pull request #6170 from mwerezak/shuttle-fixes

Fixes shuttle ETA being given before arrive_time is set