Merge pull request #31 from thelabtech/MH-534

Fix sorting for Last Survey date
Use survey_id nested in question object
Another tweak to the questions api
Questions don't have an org id
Use kind to instantiate new question
Make sure that when a question is created it gets added to the survey
Fix list UI and draggable for contacts and groups
Hide some pre-defined questions in Add Contact form
Fix conflicts after merging MH-435 to dev