Fixes #4028
Makes invisimin make mob transparent instead of icon changes.
Merge branch 'dev' of https://github.com/Baystation12/Baystation12 into dev
Merge branch 'dev' of https://github.com/Zuhayr/Baystation12 into rainbowlood
Added helper proc that adjusts brightness of given html color
Stopped robot chunks from drying up like meat ones. It's weird, and makes them pitch black.
Made blood coloring use color var instead of icon operations.
Updated icons to match (they need to be white instead of black to work)
Updated some colors to look fine on them.
Made drips use species blood too.
Readded dirtying floors.
Made blood overlays respect blood color
Derp, forgot to change back from debug icon file
Merge pull request #1 from comma/rainbowlood

Rainbowlood