fixed
fixed groupIds
Merge branch 'develop'

Conflicts:
	README.md
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
added two new fields in ExchangeSpecification.java. There was a need for a single exchange to offer both an SSL and a non-SSL data endpoint URL (https vs. http).
fixed nonce calculation
Fix failing BitcoinCentral ticker (maybe also API change is needed since high and low are null?)
added new min and max fields to depth DTO
fixed failing test
refreshed trades json data
Added Object... args to PollingMarketDataService getTrades
Depend on com.github.mmazi.rescu as an external service; remove the com.xeiam.xchange.rest package.
Merge pull request #72 from timmolter/rescu

Depend on com.github.mmazi.rescu as an external service
format/organize imports
Fixed bug https://github.com/timmolter/XChange/issues/73
Fixed https://github.com/timmolter/XChange/issues/77
removed bit floor, added link in README to snapshots
cleaned up poms