Remove housing_forms_helper_test
Add a JSON API for housing forms

For use in the housing form map, in issue #14
Merge pull request #98 from jrunningen/location-api

Location api
Remove extra horizontal rule
Extract previous/next buttons to a partial
Split form sections to their own partials
Previous/next section buttons are now on each page

This reduces some repetition in the form partial, too.
Remove unused form_picker_helper
Rename FormPicker to MainForm

It doesn't pick forms.  It's the main form.  We haven't added the form picker
yet.