R.A.W. Shadows

• Fixed a typo in lang/en_us.json

• Added a game rule (shadowInsomnia) you can enable to prevent sleeping on a new moon

• Changed spawning logic. Shadows now really invade the world by taking most of the spawning pool, replacing most usual mobs on the new moon.

• Given the roughness of the spawn rate, an easy way to defend yourself is to hold a lightsource in your hand, this works nicely with dynamic light mods. Glowing items don't work, but torches, lanterns, and light blocks do.