Integrate the splash page into the general layout

* Cleanup the CSS
* Fix more views then you have fingers and toes
* Introduce position(weight) for sponsor levels
* Fix bootstrap/datatable integration

app/views/conference/_registration.html.haml

@@ -1,22 +1,16 @@
 = content_for :splash_nav do
   %li
     %a.smoothscroll{ href: '#registration' } Registration
-%div.container.text-center
-  %div.row
-    %h1 Registration
-  - if !@conference.splashpage.registration_description.blank?
-    .lead
-      = markdown(@conference.splashpage.registration_description)
-  - if @conference.registration_dates_given?
-    -if @conference.registration_period.end_date >= Date.today
-      %h4 Registration period #{ date_string(@conference.registration_period.start_date, @conference.registration_period.end_date) }
-    -else
-      %h4 Registration is Closed, it was from #{ date_string(@conference.registration_period.start_date, @conference.registration_period.end_date) }
-  - if @conference.registration_open?
-    - if current_user && @conference.user_registered?(current_user)
-      = link_to "Modify Registration for #{@conference.short_title}", edit_conference_conference_registrations_path(@conference.short_title), class: "btn btn-success btn-lg", target: '_blank'
-    - else
-      = link_to "Register for #{@conference.short_title}", new_conference_conference_registrations_path(@conference.short_title), class: "btn btn-success btn-lg", target: '_blank'
-  - if @conference.tickets.any?
-    - if @conference.splashpage.include_tickets
-      = render 'tickets'
+
+.container
+  .row
+    .col-md-12.text-center
+      %h1 Registration
+      %p.lead
+        Going to
+        = @conference.short_title
+        is free of charge. We only ask you to 
+        = link_to "register yourself", new_conference_conference_registrations_path(@conference.short_title)
+        until
+        = @conference.registration_period.end_date
+