Complete CryptoTrade & Fix Justcoin CurrencyPairs

Justcoin:
The currency pair string was messed up during the BigMoney re-factor, meh easy fix and got my attention to go update the exchange symbols from the api rather than having them hard-coded.

Cryptotrade:
Finished up the demos and updated the currency pairs (no way to get them from the api ).  I was holding off on this pull because I am still having some issues with executing orders.  I get a 500 internal server error response even though the order gets created.  I have an open ticket with them that we have been going back and forth on so hopefully it will be fixed soon.