More configurable gamepack stuff

[Matriks404]

Right now gamepacks supports only bare-bones configuration. It is largely based on how Super Mario Bros. 2 behaves, instead of allowing the game developer more options to do stuff.

• [ ] Game type (smb2 (Super Mario Bros. 2), doki (Doki Doki Panic)
• [ ] Custom backgrounds for title screen, character select, levelbook and levels
• [ ] Animated backgrounds (such as snow or rain falling, this will be useful for Mario Xmas levelpack)
• [ ] Custom introductory story line count and width
• [ ] Character customization
  • [ ] Configurable amount of available characters
  • [ ] Walking and running speed
  • [ ] Acceleration
  • [ ] Speed multiplication when carying block
  • [ ] Jump height
  • [ ] Strength (the speed at which a character can pick up a heavy item)
  • [ ] Configurable attributes
    • [ ] Ability to float
  • [ ] and more...?