Rename 'ConferenceController' to 'ConferencesController', and 'ProposalController' to 'ProposalsController'

app/views/conferences/_tickets.html.haml

@@ -0,0 +1,25 @@
+.container
+  .row
+    .col-md-12.text-center
+      %h2
+        Support
+        =@conference.short_title
+        %p.lead
+          To support our event you can get these tickets
+  - @conference.tickets.each_slice(4) do |slice|
+    .row.row-centered
+      - slice.each do |ticket|
+        .col-md-3.col-centered.col-top.col-sm-3
+          .thumbnail
+            %p.text-center
+              %i.fa.fa-ticket.fa-5x
+            .caption
+              %h3.text-center
+                = ticket.title
+              -if ticket.description.present?
+                = markdown(ticket.description)
+              %p.text-center
+                = link_to(conference_tickets_path(@conference.short_title), class: 'btn btn-success') do
+                  Get Ticket
+                  = humanized_money_with_symbol ticket.price
+