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/layouts/_messages.html.haml

@@ -8,8 +8,11 @@
   %p
     OSEM requires JavaScript to be enabled to function. Please turn on JavaScript in your browser's settings and reload the page to continue.
 - flash.each do |type, message|
-  %div{:class=>"alert alert-dismissable #{bootstrap_class_for(type)}", :id=>"flash"}
-    .button.close{"data-dismiss" => "alert", "aria-hidden"=>"true"}
-      ×
-    %p
-      = message
+  .container
+    .row
+      .col-md-12
+        %div{:class=>"alert alert-dismissable #{bootstrap_class_for(type)}", :id=>"flash"}
+          .button.close{"data-dismiss" => "alert", "aria-hidden"=>"true"}
+            ×
+          %p
+            = message