Mining update bugs

[Fox McCloud]

I'll second the implementation of Clockwork's sprites, but I feel there should be a bit more to distinguish between gold, pharosium, and syreline first (mostly gold and syreline). If you've played for a bit, you'll probably be able to tell, but having people, even first-timers, being able to tell at just a glance, would be even more beneficial.

Overall though, great job; definitely better than the current sprites!