Add noise emitter as a new electronics craft

Noise emitter: meant to draw zombies to a given location. Uses 1 battery/turn.
Add lightstrips as a 0-level electronics craft

Meant to last for about 5 days on 15 charges of batteries, and provide 1 light. Not able to be deactivated, but can be disassembled once dead.
Merge pull request #404 from ethankaminski/elec-crafts

Add lightstrip and noise emitter (new electronics crafts)