Sprite tool should load without need for colors.png

[jessefreeman]

Need to be able to load the sprite tool without the colors.png file and just use the default system colors. This may also require refactoring of the sprite parser to independently index colors it finds in the sprites.png and attempt to match them up to the colors.png or create a new index from scratch?

[jessefreeman]

Fixed the way the color parser works so it doesn't create a situation where you open the sprite editor and there is no color data in the color chip. Leaving this open though since it will only open up empty sprites.png files, if there are colors that don't match the default colors then it will not display correctly. It needs to be fixed on the SDK level in the sprite parser.