Keynote Speakers implemented

app/views/conference/_keynote_speakers.html.haml

@@ -0,0 +1,11 @@
+%div.row.text-center
+  %div.col-md-12
+    %h3 Keynote Speakers
+  - @keynote_speakers.each do |k|
+    %div{ class: (@keynote_speakers.count.to_i <= 2 ? "col-md-#{12/@keynote_speakers.count.to_i}" : "col-md-4") }
+      = image_tag(k.gravatar_url(size: '80'), class: 'img-circle') unless k.gravatar_url.blank?
+      %h4
+        = k.name
+      -unless k.biography.blank?
+        %p
+          = k.biography

app/views/conference/_program.html.haml

@@ -12,6 +12,10 @@
           = link_to 'Schedule', conference_schedule_path(@conference.short_title), target: '_blank'
       - else
         %span The schedule is not ready yet. Stay tuned!
+
+  - unless @keynote_speakers.blank?
+    = render 'keynote_speakers'
+
   -unless @conference.tracks.blank?
     - if @conference.splashpage.include_tracks
       = render 'tracks'