Merge pull request #171 from omnibrain/kraken-authenticated

Fixed KrakenAccountDemo
Merge remote-tracking branch 'XChange/develop' into kraken-authenticated
Merge branch 'develop' of https://github.com/timmolter/XChange into kraken-authenticated
Bitcoinium Web Service module
Merge branch 'develop' of https://github.com/timmolter/XChange into kraken-authenticated
OpenOrders implemented but same problem as omnibrain:
If there are no openorders the json contains an empty array and otherwise an object
Implemented/Fixed
LimitOrder
MarketOrder
CancelOrder
Merge pull request #175 from benehsv/kraken-authenticated

Implemented PollingTradeService Kraken
Added <logger name="org.xchange" level="DEBUG" /> (Kraken uses the org.xchange.kraken package).
Bitstampauthenticated
Merge remote-tracking branch 'XChange/develop' into kraken-authenticated