edit phases using plan navigation layout

bootstrap plan progress. bootstrap sections header. added togglable section icons for expand/collapse

answers_controller returning a JSON with partial views rendered. Split question types in different partials. Started new answers/status.js

Rename view to edit_plan_answers.html.erb. Load tinymce through ES6 for question answers. Delete old status.js ES5. Added timeago to vendor

fixed broken test regarding answers_controller