CryptoTrade Trade Demo and CurrencyPair Update.
Merge remote-tracking branch 'upstream/develop' into develop
Create CryptoTradeExchange Helper
Merge remote-tracking branch 'upstream/develop' into develop

Conflicts:
	xchange-core/src/main/java/com/xeiam/xchange/currency/CurrencyPair.java
	xchange-cryptotrade/src/main/java/com/xeiam/xchange/cryptotrade/CryptoTradeAuthenticated.java
Init Justcoin currency pairs from api & fix pair string used for placing
orders.
Merge pull request #363 from jamespedwards42/develop

Complete CryptoTrade & Fix Justcoin CurrencyPairs