#279: Refactored BitstampAccountService, and associated Demo class
#279: completed refactoring BitstampMarketDataService and associated demo's
#279: Completed refactoring BitstampTradeService and associated demo's
#273: Added BitstampSuccessResponse deserailzer for appropriatly deserializing the response
Merge branch 'develop' of https://github.com/timmolter/XChange into develop
Merge pull request #296 from gnandiga/develop

#279: Completed Refactoring Bitstamp services