[libsigc++2] Created tag 2.5.3

[Murray Cumming <murrayc src gnome org>]

The unsigned tag '2.5.3' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Sat Aug 29 17:54:31 2015 +0200

    2.5.3

Changes since the last tag '2.5.2':

Murray Cumming (7):
      type_trait: Define and use type_trait_pass/take_t aliases.
      type_traits.h: Remove the unused type and pointer types.
      C++11: deduce_result_type.h: Add and use a deduce_result_t<> alias.
      exception_catch.h: Generate deduce_result_type for the void specializations too.
      tests: Use sigc::deduce_result_t<> instead of deduce_result_type<>::type.
      deduce_result_t: Add initial T_return template parameter.
      2.5.3