[libsigc++2] Created tag 2.5.1

[Murray Cumming <murrayc src gnome org>]

The unsigned tag '2.5.1' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Sat Jul 18 10:38:30 2015 +0200

    2.5.1

Changes since the last tag '2.4.1':

Kjell Ahlstedt (4):
      Require C++11
      C++11: Avoid the need for SIGC_FUNCTORS_DEDUCE_RESULT_TYPE_WITH_DECLTYPE
      Remove remaining parts of the sigc::lambda documentation
      Require mm-common 0.9.8

Murray Cumming (3):
      Remove deprecated sigc::lambda API that is only in headers.
      Remove remaining parts of the sigc::lambda API.
      2.5.1