Add data.setEmptyResponse() to surveyHelper.pathData object.
Change data.setEmptyResponse() to data.setHasResponse(bool).
Refactor pathData and instructions so that create() returns a pathData object (instructions object, respectively) which contains all other methods.
Edit CSS file to remove CSS warnings in Firefox.
Merge branch 'master' into production

Conflicts:
	index_template.php
	save.php