[glibmm] Created tag 2.31.20

[Murray Cumming <murrayc src gnome org>]

The unsigned tag '2.31.20' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Tue Mar 6 11:40:41 2012 +0100

    2.31.20

Changes since the last tag '2.31.18.1':

Josà Alburquerque (4):
      docextract_to_xml.py: Generate signal docs by default.
      tools: Add XML docs and defs generation scripts.
      Generation Scripts: Don't assume the root directory is glibmm.
      gmmproc: Allow destructors to be documented.

Kjell Ahlstedt (6):
      generate_wrap_init.pl: Improve it for deprecated files and sub-namespaces.
      generate_wrap_init.pl: Improve reg. of exception classes in sub-namespaces.
      Fix the build with --disable-deprecated-api.
      Fix exceptions thrown by Thread::create() and Threads::Thread::create.
      DBus::Error, DBus::Proxy: Fix interaction with generate_wrap_init.pl.
      Signal*: Better description of the connect*() methods.

Murray Cumming (3):
      Add back our custom Gio::HOST_WAS_NOT_FOUND enum value.
      h2defs.py: Ignore the new GDK_AVAILABLE_IN_* macros.
      Gio::Application: Add quit().