Bitminers (Miner Shelf, Power Sources, Cables, Animations & Custom Models)

UPDATE

1. Cached 3d2d circles.
2. Fixed a problem where the shelf did not recognize solar and rtg power source if watts generated was less than 0 when plugged in.
3. Added a config option to notify players in chat when the bitcoin exchange rate updates.
4. Config option is CH_Bitminers.Config.NotifyPlayersChatRateUpdate