Fix/simplify tests under sauce

Gruntfile.js

@@ -138,13 +138,11 @@ module.exports = function(grunt) {
           browsers: [
             {browserName: 'chrome'},
             {browserName: 'firefox'},
-            {browserName: 'firefox', version: '3.6'},
             {browserName: 'safari', version: 7, platform: 'OS X 10.9'},
             {browserName: 'safari', version: 6, platform: 'OS X 10.8'},
             {browserName: 'internet explorer', version: 11, platform: 'Windows 8.1'},
             {browserName: 'internet explorer', version: 10, platform: 'Windows 8'},
-            {browserName: 'internet explorer', version: 9, platform: 'Windows 7'},
-            {browserName: 'internet explorer', version: 6, platform: 'XP'}
+            {browserName: 'internet explorer', version: 9, platform: 'Windows 7'}
           ]
         }
       }

spec/builtins.js

@@ -214,6 +214,10 @@ describe('builtin helpers', function() {
   });
 
   describe("#log", function() {
+    if (typeof console === 'undefined') {
+      return;
+    }
+
     var info,
         error;
     beforeEach(function() {