javadocs
raw/generic refactor for issue #270 - Bitcurex
raw/generic refactor for issue #270 - BitcoinAverage
raw/generic refactor for issue #270 - Open Exchange Rates
removed integration tests. Too many exchanges now and too much effort to maintain valid credentials at all.
move/rename CertHelper
Merge remote-tracking branch 'upstream/develop' into develop

Conflicts:
	xchange-examples/pom.xml
Updating Justcoin and Rescu dependency.  The new rescu snapshot is
needed for fix for handling 2xx HTTP response codes other than 200
needed to work with the Justcoin API.