Prototype 0.6c

In this version:

- Created sprites for riding the skateboard
- Slightly faster skating speed
- Can only spawn in one skateboard now, but you can still spawn in as many chocolate bars as you want
- Minor GUI changes

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