Fixes gcode issue 1380. Updates and improves cryo and sleepers, including standardization and text styling.
Changes the heater to use freezer sprites.
Updates the map with sleeper directions, and Cryogenic2.dmi with sprites.
Improves readability of /obj/machinery/Topic(). Includes text styling.
 - Removed unneeded tags in the map file. The map was updated to Pete's changes to the sleeper before it was changed.
 - Moved the cable define into the cable file.