[libsigc++2] Created tag 2.5.2

[Murray Cumming <murrayc src gnome org>]

The unsigned tag '2.5.2' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Thu Aug 13 11:12:43 2015 +0200

    2.5.2

Changes since the last tag '2.5.1':

Chun-wei Fan (1):
      Visual Studio Builds: Move 2010 Projects to 2012

Kjell Ahlstedt (6):
      Update README, remove TODO
      C++11: visit_each_type<>(): Another check for the same type
      C++11: Replace deprecated std::auto_ptr by std::unique_ptr
      Store sigc++/slot.h in git, don't generate it from m4
      Update sigc++/.gitignore
      Remove the sigc++/object.h header

Murray Cumming (16):
      C++11: Use of nullptr instead of 0.
      C++11: Use std::is_base_of<> instead of our sigc::is_base_and_derived<>.
      Revert "C++11: Use std::is_base_of<> instead of our sigc::is_base_and_derived<>."
      Use -Wshadow with --enable-warnings=fatal.
      Use -Wformat-security with --enable-warnings=fatal.
      C++11: Use auto.
      C++11: More use of auto.
      C++11: Use of range-based for loops.
      C++11: Use std::is_base_of<> instead of our sigc::is_base_and_derived<>.
      C++11: visit_each<>: Check for the same type as well as the base.
      Remove the (generated) class_slot.h header.
      Remove the (generated) method_slot.h header.
      Remove the (generated) sigc++/object_slot.h header.
      Remove the (generated) sigc++/retype.h header.
      Remove the (generated) sigc++/hide.h header.
      2.5.2