Migrate all jasmine specs to Qunit. Removed Jasmine.

test/javascripts/integration/header_test.js

@@ -13,6 +13,8 @@ module("Header", {
 test("/", function() {
 
   visit("/").then(function() {
+    expect(2);
+
     ok(exists("header"), "The header was rendered");
     ok(exists("#site-logo"), "The logo was shown");
   });