refactored for new webservice API
Merge branch 'develop' of github.com:timmolter/XChange into develop
Return remaining amount for open orders.
Merge pull request #622 from Achterhoeker/patch-11

Return remaining amount for open orders.
fixed Exception caused when only 1 CurrencyPair is provided
Merge pull request #625 from nimrood/develop

fix for issue#623 - Exception caused when only 1 CurrencyPair is provided
Implement BTCChina Trade API v2.0.1: Added two more parameters for getTransactions API method: "since" and "sincetype".