Implements iChain authentication

app/views/users/show.html.haml

@@ -0,0 +1,16 @@
+%h1
+  = @user.name
+%h4
+  = @user.biography
+
+- if @user.events.confirmed.any?
+  %h3
+    = "#{@user.name} presents #{pluralize(@user.events.confirmed.count, 'Event')}:"
+  %ul.list-unstyled
+    - @user.events.confirmed.each do |event|
+      %li
+        %h4
+          = link_to event.title, conference_proposal_path(event.conference.short_title, event.id)
+          %strong
+            at
+          = event.conference.title