Consistent design and code cleanup of splashpage elements.

* get rid of unnecessary slice()
* center up small groups of elements
* consistent text use FIXME: extract out strings
* consistent date strings
* simplified views for easier theming

app/views/conferences/_tickets.html.haml

@@ -9,22 +9,17 @@
         .col-md-12.text-center
           %h2
             Support
-            =@conference.short_title
-            %p.lead
-              To support our event you can get these tickets
-      - @conference.tickets.each_slice(4) do |slice|
-        .row.row-centered
-          - slice.each do |ticket|
-            .col-md-3.col-centered.col-top.col-sm-3
-              .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
-                      Get Ticket
-                      = humanized_money_with_symbol ticket.price
+            =@conference.title
+      .row.row-centered
+        - @conference.tickets.each do |ticket|
+          .col-md-3.col-sm-3.col-centered.col-top
+            %h3.text-center
+              = ticket.title
+            %h3.text-center
+              %i.fa.fa-ticket.fa-3x
+            = markdown(ticket.description)
+            %p.text-center
+              = link_to conference_tickets_path(@conference.short_title),
+                class: 'btn btn-success' do
+                Get Ticket
+                = humanized_money_with_symbol ticket.price