Add a missing quote to unfinished quoted strings in _WRAP directives

* gtk/src/colorbutton.hg:
* gtk/src/entrycompletion.hg:
* gtk/src/widget.hg: Add a missing double quote in gmmproc directives like
_WRAP_PROPERTY("text_column, int).
Gtk::Misc: Deprecate all methods and properties

* demos/gtk-demo/example_change_display.cc:
* demos/gtk-demo/example_sizegroup.cc: Don't use deprecated Misc methods.
* gtk/src/bin.[ccg|hg]: Deprecate add_label(const Glib::ustring& label,
bool mnemonic, double x_align, double y_align) and
add_pixlabel(const std::string& pixfile, const Glib::ustring& label,
double x_align, double y_align). Add add_pixlabel(const std::string& pixfile,
const Glib::ustring& label, Align x_align, Align y_align).
* gtk/src/label.[ccg|hg]: Deprecate Label(const Glib::ustring& label,
float xalign, float yalign, bool mnemonic).
* gtk/src/menuitem.ccg: Don't use deprecated Misc property.
* gtk/src/misc.hg: Deprecate all methods and properties. GtkMisc is deprecated,
but we can't deprecate Gtk::Misc completely, because it's a base class of
Arrow, Label and Image. Label and Image are not deprecated.