Merge remote-tracking branch 'upstream/develop' into issue_726

Conflicts:
	xchange-bitfinex/src/main/java/com/xeiam/xchange/bitfinex/v1/BitfinexAdapters.java
	xchange-bitfinex/src/main/java/com/xeiam/xchange/bitfinex/v1/dto/trade/BitfinexTradeResponse.java