Remove unused templates and views from old surveys.
remove channel column.
Update surveys edit.html template to work with the new template base classes.
Remove unused templates.
Fix test_new_conversation test.
added multiple surveys button.
Merge branch 'feature/issue-523-hook-up-old-survey-edit-pages' into develop-frontend
Merge branch 'develop-frontend' into feature/issue-525-multiple-surveys
Merge branch 'feature/issue-525-multiple-surveys' into develop-frontend
Merge branch 'develop-frontend' into feature/issue-530-better-channel-detail-page