Build 21 - Added fps unlock option

Build 21
- Added the green and red boxed key buttons. The green one unlocks the fps cap from 60 and sets the new cap to 250. This also increases the game speed, so everything will run quicker. The red button will keep it to the normal stable 60 fps. This was added so the game can do things like draw lines quicker by checking the right mouse button down even under the spawner object.
- Added parenting to the weight object which reduced the number of collision checks needed and improves the stability of the game.
- Added the limited power achievement.
- Added unlimited power achievement.