Add lightstrip and noise emitter (new electronics crafts)

Adds two new electronics recipes, to make the skill more useful. Both items are improvised, so in my mind, they shouldn't be found in any pre-cataclysm loot piles (e.g., electronics stores shouldn't have them).

1. Lightstrip: 1-tile illumination, lasts 5 days and 5 hours with 15 batteries, cannot be deactivated (although the amplifier circuit can be salvaged when dead). Meant to provide small markers during the night. Due to turns_per_charge being a char instead of an int, I had to give it an absurd number of charges and a moderate number of turns_per_charge.

2. Noise emitter: modified radio that makes a loud racket. Meant for use as a decoy. Uses batteries faster than a radio. I *think* I set the noise level just slightly lower than the amount that would trigger more dynamic spawns.

Also, I made the lightstrip a 0-level recipe partly because "What is a Transistor?" can be really hard to find, and I'd rather not have to disassemble 50 flashlights to get started on the skill. (impossible without a book is one thing, but grindy is just unpleasant)