Merge pull request #1857 from velesin/qunit_not_assertion

Adds new QUnit assertion ("not") complementary to built-in "ok"

.jshintrc

@@ -14,6 +14,7 @@
     "integration",
     "test",
     "ok",
+    "not",
     "expect",
     "equal",
     "blank",

test/javascripts/helpers/assertions.js

@@ -17,4 +17,8 @@ function blank(obj, text) {
 
 function containsInstance(collection, klass, text) {
   ok(klass.detectInstance(_.first(collection)), text);
-}
+}
+
+function not(state, message) {
+  ok(!state, message);
+}