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

app/views/conferences/_registration.html.haml

@@ -0,0 +1,30 @@
+= content_for :splash_nav do
+  %li
+    %a.smoothscroll{ href: '#registration' } Registration
+
+.container
+  .row
+    .col-md-12.text-center
+      %h1 Registration
+
+      - if @conference.registration_limit_exceeded?
+        %p
+          Sorry, the conference registration limit has exceeded
+      - else
+        - if @conference.tickets.empty?
+          %p.lead
+            Going to
+            = @conference.short_title
+            is free of charge.
+          %p
+            We only ask you to register yourself until
+            = @conference.registration_period.end_date.strftime('%A, %B %-d. %Y')
+            so we can plan for the right amount of people.
+            %p.cta-button
+        - else
+          %p
+            The registration period ends on
+            = @conference.registration_period.end_date.strftime('%A, %B %-d. %Y')
+          %p.cta-button
+        = link_to(new_conference_conference_registration_path(@conference.short_title), class: 'btn btn-lg btn-success') do
+          Register Now