Updates the 1.4.0 release notes.

CHANGES

-Changes for 1.2.0 (up to r194):
+Changes for 1.4.0 (we skipped 1.2.* and 1.3.* to match the version of
+Google Test):
 
- * New feature: own implementation of TR1 tuple (no more dependency on
-   Boost!).
- * New feature: support for Visual C++ 7.1.
+ * Works in more environments: Symbian and minGW, Visual C++ 7.1.
+ * Lighter weight: comes with our own implementation of TR1 tuple (no
+   more dependency on Boost!).
  * New feature: --gmock_catch_leaked_mocks for detecting leaked mocks.
  * New feature: ACTION_TEMPLATE for defining templatized actions.
  * New feature: the .After() clause for specifying expectation order.
@@ -10,15 +11,16 @@ Changes for 1.2.0 (up to r194):
    constraints.
  * New feature: actions ReturnArg<k>(), ReturnNew<T>(...), and
    DeleteArg<k>().
- * New feature: matchers Key(m), Args<...>(m), AllArgs(m), and
-   Contains(m).
+ * New feature: matchers Key(), Pair(), Args<...>(), AllArgs(), IsNull(),
+   and Contains().
+ * New feature: utility class MockFunction<F>, useful for checkpoints, etc.
  * New feature: functions Value(x, m) and SafeMatcherCast<T>(m).
  * New feature: copying a mock object is rejected at compile time.
  * New feature: a script for fusing all Google Mock and Google Test
    source files for easy deployment.
  * Improved the Google Mock doctor to diagnose more diseases.
  * Improved the Google Mock generator script.
- * Compatibility fixes for Mac OS X, Symbian, and gcc.
+ * Compatibility fixes for Mac OS X and gcc.
  * Bug fixes and implementation clean-ups.
 
 Changes for 1.1.0: