Prototype 0.6b

In this version:

- Fixed inventory bugs. Turns out I was just over-complicating the code. It should be working perfectly fine now.
- Made the sprite a little less blurry when moving diagonally.

Future plans:

- More sounds
- Continue working on inventory system
- Combat testing (not exactly sure how I want to make it yet)
- More GUI changes?
- Start development on the main map of the game
- Main Menu
- Character creation