Open Modular Lighting

Added

• Disguise for the electric, carbon and UV floodlights: put a full, opaque block into the new slot of the GUI and the light looks like that block, with only its lamp showing on the front; the disguise stays on the dropped light
• A "?" in the electric and carbon floodlight GUIs explains the delay before a light can turn back on
• Toggling invert on a light that is still in that delay tells you in chat how many seconds until it turns on

Changed

• Cube and fluorescent lights turn back on at once, without the 2-second timeout after turning off
• The config file now has a version: config files from older versions get the new default energy use and grow chance, unless the value was changed by hand