Fix for callback not being added in the arguments  in PubnubCore.publish()
update origin in tests
fix group subscribe issue
fix tests for channelGroupRemoveGroup()
Merge pull request #27 from ntoskrnl/master

Fix for callback not being added in the arguments  in PubnubCore.publish()
fix NamespaceTest
fix UnsubscribeTest (add timeouts)
Merge branch 'fix-3.7.1' into develop