Renamed controler.dm.
Merged multiz icons into structures.dmi.
Mass correction of controler to controller.
Compile fix for merged icon.
Updated .dme.
Compile fix for what I think was a botched merge with Chemistry-Machinery.dm.
Fixes so ladders actually connect and function now.
Merge pull request #4342 from Zuhayr/ihategit

Multiz changes.