[glibmm/glibmm-3maybe] (33 commits) ...Merged from master

[Murray Cumming <murrayc src gnome org>]

Summary of changes:

  bafd0dc... Remove a junk line from VolumeMonitor.hg. (*)
  d068069... Use GLIBMM_DISABLE_DEPRECATED on StreamIoChannel. (*)
  c7049cf... Mark version in ChangeLog (*)
  858f51a... Settings: Fix the build with the latest glib. (*)
  9190c6a... 2.25.2 (*)
  94e8523... 	Preliminary implementation of Glib::Variant<> classes. (*)
  7ba80a6... Restore lost #else block to fix build without __STDC_ISO_10 (*)
  aaafa18... 	Glib::Variant<>: Use gmmproc files so wrapping is not done (*)
  eceba86... Clean up glib_functions.defs. (*)
  9dfa656... Simplify VariantBase .hg code and use it in Settings. (*)
  13b1f14... Added DBusConnection (*)
  384e031... Fix the build for a GDBusConnection API change. (*)
  351a3b0... giomm: Added Credentials and DBusConnection::get_peer_crede (*)
  004419a... Added DBusMessage and DBusConnection::send_message(). (*)
  12bf44c... giomm: DBusMessage: Added create_*() methods. (*)
  e72781a... giomm: DBusMessage: Added several  methods. (*)
  7d45142... Variant: Added some methods. (*)
  05860f7... Revert changes that I did not mean to commit yet. (*)
  1da3fe5... Settings example: Minor change. (*)
  96c1f18... Variant<>: Make this usable as an ouput parameter. (*)
  62e2598... DBusMessage: Add get_header() and set_header(). (*)
  856e154... Add Gio::DBusAuthObserver. (*)
  9cc5eeb... Fix warnings. (*)
  c24b1a6... 	Gio::DBusAuthObserver: Make parameters constant. (*)
  3eaa28a... DBusAuthObserver: Fix the build with latest glib. (*)
  53fd3db... 	Add Gio::DBusServer. (*)
  e6404aa... 	Gio::DBusServer: Use the _CONSTRUCT macro in the construct (*)
  bc26aa4... 	Add Gio::UnixFDList. (*)
  c43f74e... 	Gio::UnixFDList: Add params and returns in create() method (*)
  657bb68... 	Gio::UnixFDList: peek_fds(): Made return const for emphasi (*)
  0e17b03... 	Gio::Message: Wrap several methods. (*)
  9f01782... 	Add Gio::DBusMethodInvocation. (*)
  88b5293... Merged from master

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