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/home/index.html.haml

@@ -1,5 +1,6 @@
-.row
-  .col-md-12.page-header
-    %h2.text-center Upcoming Conferences
-- @current.each do |conference|
-  = render :partial => "conference_details", :locals => {:conference => conference}
+.container
+  .row
+    .col-md-12.page-header
+      %h2.text-center Upcoming Conferences
+  - @current.each do |conference|
+    = render :partial => "conference_details", :locals => {:conference => conference}