Refactored PollResponse so it doesn;t have an explicit list of messages.
Fixed Poll.getDisplayText()
Fixed poll instantiation in functional tests.
Merge branch 'master' into CORE-1696
Cleaned up test data creation for unit and integration tests.
Merge branch 'master' into CORE-1696
Fixed PollResponse unit test.
Merge branch 'master' into CORE-1696
Minor change to CSS and markup for no-content messages.
Merge branch 'master' into CORE-1838