Added slided effect on page answer survey "participation/:id"

Remove top margin from bottom div and added to content last child as bottom in public/css/answer.css

Added slideDown in public/js/style.js for the same page
Added Share initial page, base on answer layout
View: app/views/share.erb
Route: app/controllers/share.rb
CSS : public/css/share.css

Will allow the user to send his survey by mail.

Added link to the CSS in the layout : app/views/layout.erb