Camera Update

Added camera sprint & update the camera position with regenerate()
FPS changes

Updated ToolFPS to include min&max values.  Fixed color bug

Add FPS graph tool - this tool doesnt work in the web player for some
reason...
Misc Changes

Update dig prefab to have different color.  Removed random debug lines.
Added debug raycast to dig.  Added boud boxes for sculpting multiple
meshes.