[libsigcplusplus] Created tag 2.9.1

[Murray Cumming <murrayc src gnome org>]

The unsigned tag '2.9.1' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Wed Mar 16 14:00:54 2016 +0100

    2.9.1

Changes since the last tag '2.7.2':

Kjell Ahlstedt (1):
      Implement slot<R(Arg...)> with variadic template

Murray Cumming (12):
      slot: Allow sigc::slot<R(Args...)> declaration, like std::function.
      signal: Allow sigc::signal<R(Args...)> declaration, like std::function.
      slot.h.m4: Slight reorganisation of m4 code.
      signal.h.m4: Slight reorganization of m4 code.
      signal: Use the slot<R(Args..)> syntax.
      signal: Document older syntax as deprecated.
      slot: Document older syntax as deprecated
      Reference docs: Main page: Mention CMake.
      test_retype: Break into smaller tests.
      test_retype: Add test of R(Args...) syntax.
      Update NEWS from 2.8.0
      2.9.1