Removed skein coins from the main list.
Added basic json data for coin pages - returns per day mining calculations.

For example:
http://www.whattomine.com/coins/1.json?hr=1155.0&br=25.0&d=159173130679.715&p=590.0&fee=0.0&cost=0.1&hcost=0.0&btc=405.801