#5186 configure karma

and add first karma test

tests/js/doctools.js

@@ -0,0 +1,12 @@
+var DOCUMENTATION_OPTIONS = {};
+
+describe('urldecode', function() {
+
+  it('should fail', function() {
+    var test_encoded_string =
+      '%D1%88%D0%B5%D0%BB%D0%BB%D1%8B+%D1%88%D0%B5%D0%BB%D0%BB%D1%8B';
+    var test_decoded_string = 'шеллы шеллы';
+    expect(jQuery.urldecode(test_encoded_string)).toEqual(test_decoded_string);
+  });
+
+});