Merge pull request #2 from cabowles/master

Added MtGox
added mtgox socket.io channel
merged / fixed merge conflicts with mtgox add
added Mt. Gox exchange rates (realtime)
altered dependencies
altered dependencies again
using http instead of https to connect to mtgox
changed data type for coinbase jsonp request
removed socket.io from package dependencies
added loading sign to socket exchange apis, changed data type on coinbase api jsonp request from application/json to application/javascript
Some changes