initial commit
code optimizations
further code optimizations in cable.dm
adds catwalks
Merge branch 'master' of https://github.com/tgstation/-tg-station into walkthecat

Conflicts:
	_maps/map_files/TgStation/tgstation.2.1.3.dmm
Merge branch 'master' of https://github.com/tgstation/-tg-station into walkthecat

Conflicts:
	_maps/map_files/TgStation/tgstation.2.1.3.dmm
cleans up sprites a bit and removes some catwalks on map
further updates smoothing and icons
clicking on the lattice will now construct a catwalk as well
Merge pull request #6601 from paprka/walkthecat

Adds catwalks