Remove health consideration from unit resale value
Removed dependency on custom health bar plugin
Added global health
Added height illusion for projectiles
Moves  implementation to treasury.js
Added previews entities, and updated to comply with the new hitbox schema in Cheese
Updated .gitignore to ignore minified JS in the root
Fixed bug where upgrades could be applied even when they couldn't be afforded
Modified TODO
Moved cursor implementation to a separate file. Implemented a rudimentary timeline system for managing enemy appearance, etc. Still needs some improvement.