[glibmm] Created tag 2.51.6

[Murray Cumming <murrayc src gnome org>]

The unsigned tag '2.51.6' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Thu Mar 30 21:44:21 2017 +0200

    2.51.6

Changes since the last tag '2.50.0':

Chun-wei Fan (1):
      Visual Studio builds: "Install" the .pdb files

Daniel Boles (9):
      Gio::ActionMap: Clarify doc of ActivateWithParameterSlot
      Gio::ActionMap: Add function to ActivateSlot doc
      Gio::Action: #include <glibmm/variant.h> in hg
      Gio::Action: Remove unneeded #includes in ccg
      Glib::Variant: Fix a copy-pasted typo in func docs
      Glib::Variant—Cosmetically tweak braces & newlines
      Glib::Variant—Explain how to create “maybe” types
      Glib::Variant—Improve documentation of get_maybe()
      SimpleAction—doc—Erase wrong line & duplicate word

Kjell Ahlstedt (4):
      Gio::DBus::Proxy: Fix memory leak in get_cached_property_names()
      Glib::Dispatcher: Don't cast a HANDLE to an int on Windows
      Gio::ActionMap: Fix some trivial documentation bugs
      Gio::Application::get_default(): Add refreturn

Marcin Kolny (3):
      Gio::Settings: fix type of 'key' parameter of writable-change-event signal
      Gio::SettingsSchemaSource: do an extra reference() for returning value
      PollFD: autodeduce type of fd field

Murray Cumming (3):
      Examples: Avoid a warning about unused code.
      ustring: Add cbegin() and cend().
      2.51.6

djb (1):
      Gio::Settings: Make set_enum() + set_flags() usable