Merge master and C++11 strongly typed enum support

Merging from master:
* 'master' of github.com:/swig/swig:
  Add more docs about _global_ prefix in typemap temporary variables
  Add clarification on _global_ prefix.
  fix for nested template defined out of class (issue #265)
  using an unknown constant emits a notice, not a warning
  Fix typo
  Consistently put whitespace outside of <tt>...</tt> and not inside
  wording tweak
  Go: Document memory management of C++ classes allocated in Go.  Fixes #266.
  revert unrelated file
  Fix #224
  Fixes for clang -fsanitize=undefined-trap -fsanitize-undefined-trap-on-error
  delete unmeaningful macro
  Go: fix overload functions with polymorphic issue
  del tmp files
  GoLang:fix overload functions with polymorphic issue

Examples/test-suite/common.mk

@@ -311,6 +311,7 @@ CPP_TEST_CASES += \
 	overload_extend \
 	overload_method \
 	overload_numeric \
+	overload_polymorphic \
 	overload_rename \
 	overload_return_type \
 	overload_simple \