Another round of splash design

* Add map to splash
* Reverse venue<->conference relation
* Split venue address into fields
* Don't go through venue for lodgings anymore

app/views/conference/_tickets.html.haml

@@ -1,21 +1,25 @@
 .container
   .row
     .col-md-12.text-center
-      %h1
+      %h2
         Support
         =@conference.short_title
         %p.lead
-          To support our event you can purchase tickets
-  .row
-    - @conference.tickets.each do |ticket|
-      %div{ class: (@conference.tickets.count <= 2 ? "col-md-#{12/@conference.tickets.count}" : "col-md-4") }
-        - if ticket.title.present?
-          %h4.text-center
-            =ticket.title
-        - if ticket.description.present?
-          = markdown(ticket.description)
-        .text-center
-          .btn-group
-            = link_to(conference_tickets_path(@conference.short_title), class: 'btn btn-success') do
-              Buy Ticket
-              = "#{humanized_money_with_symbol ticket.price}"
+          To support our event you can purchase these tickets
+  - @conference.tickets.each_slice(4) do |slice|
+    .row.row-centered
+      - slice.each do |ticket|
+        .col-md-3.col-centered.col-top
+          .thumbnail
+            %p.text-center
+              %i.fa.fa-ticket.fa-5x
+            .caption
+              %h3.text-center
+                = ticket.title
+              -if ticket.description.present?
+                = markdown(ticket.description)
+              %p.text-center
+                = link_to(conference_tickets_path(@conference.short_title), class: 'btn btn-success') do
+                  Buy Ticket
+                  = humanized_money_with_symbol ticket.price
+