Update MtGoxAdapters.java

Fixed missing trading fee for mtgox account
Merge pull request #252 from deveth0/master

Update MtGoxAdapters.java
Merge branch 'master' of https://github.com/timmolter/XChange into develop
Merge branch 'develop' of https://github.com/timmolter/XChange into develop
#273: Refactored MtGoxAccountService
#273: Refactored MtGoxMarketDataService
#273: Refactored MtGoxTradeService
#273: Updated demo's to run both raw and generic services
#273: Updated MtGoxMarketDataService as per @jamespedwards42 code review
#273: Updated method name to camelCase
#273: Updated MtGoxAccountService to do checks on arguments
Merge pull request #287 from gnandiga/develop

#273 Refactoring complete