fixed
fixed groupIds
Merge branch 'develop'

Conflicts:
	README.md
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
added .travis.yml
Merge branch 'develop'

Conflicts:
	.travis.yml
Merge branch 'develop'
Merge branch 'master' of https://github.com/timmolter/XChange into develop
Added Date to OrderBook + Constructor + Getter
Merge remote-tracking branch 'XChange/develop' into develop
Added BTCETradesHistory + Adapters and Tests also added parameters for tradeHistory requests
Added Dates to OrderBook implemented for MtGox Polling V2 and Bitstamp also new example orderbook for Bitstamp
Merge pull request #159 from benehsv/develop

Added BTCE transactions history and Timestamp of the OrderBook for Bitstamp and Mtgox