[gtkmm] Created tag 3.89.5

[Murray Cumming <murrayc src gnome org>]

The unsigned tag '3.89.5' was created.

Tagger: Murray Cumming <murrayc murrayc com>
Date: Thu Mar 16 22:50:52 2017 +0100

    3.89.5

Changes since the last tag '3.89.4':

Chun-wei Fan (1):
      Visual Studio builds: Require Visual Studio 2017

Kjell Ahlstedt (13):
      Gdk::RGBA: Add alpha parameter to set_hsv() and set_hsl()
      Gdk::Window::constrain_size(): WindowHints flags
      Gdk::Pixbuf: Throw exception from ctor, add get_pixels(guint& length)
      Gtk::AccelMap: Glib::ustring accel_path
      Regenerate gtk_signals.defs
      Gtk::Assistant: Add child properties and a ctor with use_header_bar
      Gtk::IconView: Mark output parameters in Doxygen comments
      Gtk::TreePath::get_from_selection_data(): const TreeModel
      Gtk::Widget: Remove get_valign_with_baseline()
      Move Gtk::PrintSettings::PageRange out of PrintSettings
      Gtk::RecentManager: Remove unused SlotChanged
      Gtk::ScaleButton: Let get_[plus,minus]_button() return Button*
      Gtk::TreeIter<>: Fix operator==() and operator!=()

Murray Cumming (6):
      Dialog: Simplify the constructors.
      About Dialog: Add construtor with a use_header_bar parameter.
      tests: tree_model_iterator: Add simple test of constness issues.
      Tree*, ComboBox*: Change some parameters to const_iterator.
      TreeModel: Use const_iterator for some vfunc parameters.
      3.89.5