Lights and Larger Map

[cosmiccoincidence]

Summary

This PR adds light prefabs and tilemap objects, expands the test map, and makes several small fixes.

Changes to Files

• Adds prefabs for LightTubeFixture, LightBulbFixture, & LightSwitch.
• Adds tilemapobjects for LightTubeFixture, LightBulbFixture, & LightSwitch.
• Links missing materials on several prefabs.
• Removes unused airlock prefab.
• Expands the test map.

Known issues

Lights look like crap because I didn't edit them at all, just threw the default spotlights into the light fixture prefabs. Someone else can make the lights look better later.