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
Merge remote-tracking branch 'upstream/master' into develop
Merge remote-tracking branch 'upstream/develop' into develop