GUI Overhaul

Lots of changes to the GUI, and some refactoring.
More GUI Changes

still need to get the level unlocking in order. Everything else is
working mostly as intended.
GUI scaling (mostly) implemented

Still need to adjust button scaling/fully implement button class
GUI, GFX, SFX Overhauled

Almost an entirely new game! Beta V1.0! Now with (unused) Unity Unit
Testing!
Added Particle effects, a few bug fixes

Particle effects are awesome. Fixed (I think) problems with levels not
loading properly for new players.
Minor Fixes

Fixed some SFX issues, changed names of upgrade menu/buttons for clarity
Merge pull request #4 from InfernalLogic/GUI_Overhaul

Gui overhaul