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

app/views/admin/conferences/_top_submitter.html.haml

@@ -0,0 +1,18 @@
+.row
+  .col-md-12
+    %h3
+      Top Submitter
+    - if @top_submitter && !@top_submitter.empty?
+      - @top_submitter.each do |key, value|
+        .row.top-submitter
+          .col-md-2
+            = image_tag(key.gravatar_url(size: '25'), title: "Yo #{key.name}!", :alt => '', 'class'=>'img-circle img-responsive text-center')
+          .col-md-10
+            %h4
+              = link_to key.name, admin_user_path(key)
+              %div
+                %small
+                  = link_to pluralize(value, 'submission'), admin_user_path(key, tab: 'submissions-content')
+    - else
+      %h4.text-warning
+        No submissions!