added `Tester.assertFalse()` as an alias of `Tester.assertNot()`

@@ -5,6 +5,7 @@ XXXX-XX-XX, v1.0.0
 ------------------
 
 - fixed [#266](https://github.com/n1k0/casperjs/issues/266) - Fix `tester` module and its self tests
+- added `Tester.assertFalse()` as an alias of `Tester.assertNot()`
 
 2012-10-31, v1.0.0-RC4
 ----------------------

@@ -344,7 +344,7 @@ Tester.prototype.assertMatch = Tester.prototype.assertMatches = function assertM
  * @param  String   message    Test description
  * @return Object              An assertion result object
  */
-Tester.prototype.assertNot = function assertNot(condition, message) {
+Tester.prototype.assertNot = Tester.prototype.assertFalse = function assertNot(condition, message) {
     "use strict";
     return this.assert(!condition, message, {
         type: "assertNot",