[libsigc++2] 2.5.4

[Murray Cumming <murrayc src gnome org>]

commit a32ae33270a08be07056fd399334b040abb8574b
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Sep 3 18:18:23 2015 +0200

    2.5.4

 NEWS         |   15 +++++++++++++++
 configure.ac |    2 +-
 2 files changed, 16 insertions(+), 1 deletions(-)
---
diff --git a/NEWS b/NEWS
index 16ef295..8a44c0d 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,18 @@
+2.5.4 (unstable):
+
+* slot_base::operator=(const &): Copy the blocked too,
+  so the destionation is blocked if the source is blocked,
+  regardless of whether the destionation was previously
+  blocked, because this seems to be what we should expect.
+  (Murray Cumming)
+* C++11: slot_base, slot*, signal_base, signal*, trackable:
+  Add move operations.
+  (Murray Cumming)
+* Update MSVC Projects, requiring at least MSVC++ .Net 2013
+  for C++11 support.
+  (Chun-wei Fan)
+
+
 2.5.3 (unstable):
 
 * Use C++11 "using" aliases to simplify code that uses type traits.
diff --git a/configure.ac b/configure.ac
index 88bf968..ae12338 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,7 +15,7 @@
 ## You should have received a copy of the GNU Lesser General Public License
 ## along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
-AC_INIT([libsigc++], [2.5.3],
+AC_INIT([libsigc++], [2.5.4],
         [http://bugzilla.gnome.org/enter_bug.cgi?product=libsigc%2B%2B],
         [libsigc++], [http://libsigc.sourceforge.net/])
 AC_PREREQ([2.59])