Merge branch 'ZackerySpytz-director-classes-final-methods'

* ZackerySpytz-director-classes-final-methods:
  Warning tweaks for destructors that are final in director classes
  Documentation for directors and virtual final methods
  Fixes for final destructors in director classes
  Warning fix for final destructor in directors
  Remove a useless warning filter
  Fix the handling of director classes with final methods

Examples/test-suite/python/cpp11_final_directors_runme.py

@@ -0,0 +1,11 @@
+import cpp11_final_directors
+
+class Derived2(cpp11_final_directors.Derived):
+
+    def meth(self):
+        return 3
+
+
+b = Derived2()
+if b.meth() != 3:
+    raise RuntimeError