Performance Fix

I've been hard at work getting those worms to stop tanking everyone's performance so bad, and we've finally made some progress. Along the way, I've made some other small adjustments to the game's balance/pacing, and have prepared the framework for implementing new spells and objects in a future update! For now, here's what's new:

• heavy worm optimization (game can handle about 5x as many worms)
• optimized several other objects and controllers
• increased the worm spawn rate of Terrariums
• reduced the cost of the Summoning Circle and the Mystic Orb
• updated some spell descriptions
• updated some pop-up text
• adjusted look of soul trails