Log Message:
Update to 3.16.0:

3.16.0 (stable):

Gtk
* Builder: Don't get gtkmm-derived GTypes while parsing TreeModel <columns>
  (Kjell Ahlstedt) Bug #742637.

3.15.10 (unstable);

Gtk:
* Label: Add get/set_xalign/yalign() and properties.
  (Murray Cumming)
* PaperSize: Define the paper name constants in the .cc file
  (Benoît Dejean) Bug #745345

Documentation:
* CssProvider::load_from_data(): Document that this throws an exception.
  (Murray Cumming)
* Icon theme demo: Catch exceptions while loading icons.
  (Kjell Ahlstedt)
* Stock: Mention the named icons for Copy, Cut, Paste and Delete.
  (Murray Cumming) See GTK+ bug #741969

3.15.9 (unstable);

Gtk:
* Add StackSidebar.
  (Kjell Ahlstedt)
* StackSwitcher: Add unset_stack().
  (Kjell Ahlstedt)
* StyleContext: Deprecate list_regions(), add_region(),
  remove_region(), has_region(), get_backgrount_color(), get_border_color(),
  invalidate.
  (Kjell Ahlstedt)
* TextBuffer: Wrap the serialize()/deserialize() methods.
  (Kjell Ahlstedt) Bug #694250
* Widget: Deprecate  Deprecate override_color(), unset_color(),
  override_background_color(), unset_background_color(), override_font(),
  unset_font(), override_symbolic_color(), unset_symbolic_color(),
  override_cursor(), unset_cursor().
  (Kjell Ahlstedt)
* Window: Deprecate Deprecate property_has_resize_grip(),
  property_resize_grip_visible(), set/get_has_resize_grip(),
  get_resize_grip_is_visible(), get_resize_grip_area().
  (Kjell Ahlstedt)
* Fix error messages from gmmproc by removing unnecessary _IGNORES()s.
  (Kjell Ahlstedt)

Gdk:
* Device: Add get_vendor_id() and get_product_id().
  (Murray Cumming)

Documentation:
* demos: Add stacksidebar demo.
  (Kjell Ahlstedt)
* demos: Replace calls to deprecated Widget::override_*() API.
  (Kjell Ahlstedt)
* Container: Remove obsolete comments that confuse doxygen.
  (Kjell Ahlstedt)
* Put DOXYGEN_SHOULD_SKIP_THIS around *_Class prototypes.
  To workaround a doxygen bug, to fix the genereated DevHelp search index.
  (Murray Cumming) Bug #743918

3.15.4 (unstable);

Gtk:
* Builder::get_type_from_name_vfunc(): Call the base class function.
  Instead of jusgin calling g_type_from_name(), in case the base class
  function does more.
  (Kjell Ahlstedt) Bug #742637.
* TextBuffer:
  - Add insert_martkup().
  - Add the copy_target_list and paste_target_list properties.
  (Kjell Ahlstedt)

Documentation:
* Pixbuf: Change a mention of Glib::ResourceError to Gio::ResourceError.
  (Kjell Ahlstedt)

3.15.3 (unstable);

Gtk:
* CssProvider: Add CssProviderError and signal_parsing_error()
  (Kjell Ahlstedt)
* Add CssSection.
  (Kjell Ahlstedt)
* Dialog: Fix the constructors with DialogFlags.
  (Kjell Ahlstedt) Bug #738513 (Simonas Kazlauskas)
* ScaleButton:
  - Correct the constructor.
  - Add a constructor without the icons.
  (Murray Cumming)
* ScrolledWindow: Add get/set_overlay_scrolling() and property.
  (Juan R. García Blanco)
* Stack: Add hhomogeneous and vhomogeneous properties.
  (Juan R. García Blanco)
* TextTag: Add fallback, fallback-set, letter-spacing, and
  letter-spacing-set properties.
  (Juan R. García Blanco)
* TextView: Add monospace property.
  (Juan R. García Blanco)
* Widget: Added get_action_group() and list_action_prefixes().
  (Murray Cumming)

Documentation:
* Add an empty line after @newin where it's missing.
  (Kjell Ahlstedt)
* Fix some Doxygen warnings.
  (Kjell Ahlstedt)
* ScaleButton: Document the constructors.
  (Murray Cumming)

3.15.2 (unstable);

Gtk:
* Dialog: Add constructors with DialogFlags,
  for instance to create a dialog with a header bar.
  (Kjell Ahlstedt) Bug #738513.
* Grid: Add attach_next_to() without the 'sibling' parameter.
  (Kjell Ahlstedt)  Bug #739340.
* Overlay:  Correct the "since" documentation.
* SearchEntry: Add the search_changed signal
  (Kjell Ahlstedt)
* Added StyleProperty
  (Mark Vender) Bug #673317.

Gdk
* Curor: Deprecate the constructor that doesn't take a Display parameter.
  (Murray Cumming)
* Pixbuf: Deprecate create_from_inline().
  (Kjell Ahlstedt)