Replace #set_x with #x= in examples where this now works.

- #title= works because title is a property for Gtk::Window.
- #urgency= and #timeout= work through method_missing.
- #border_width= doesn't work yet.

examples/02_hello_world.rb

@@ -14,6 +14,7 @@
 end
 
 GObject.signal_connect(win, "destroy") { Gtk.main_quit }
+# FIXME: #border_width= should work
 win.set_border_width 10
 
 but = Gtk::Button.new_with_label("Hello World")

examples/03_upgraded_hello_world.rb

@@ -12,13 +12,14 @@
 Gtk.init
 
 win = Gtk::Window.new(:toplevel)
-win.set_title "Hello Buttons!"
+win.title= "Hello Buttons!"
 
 GObject.signal_connect win, "delete-event" do
   Gtk.main_quit
   false
 end
 
+# FIXME: #border_width= should work
 win.set_border_width 10
 
 box = Gtk::HBox.new(false, 0)

examples/05_notification.rb

@@ -12,8 +12,8 @@
 
 # Basic set up of the notification.
 nf = Notify::Notification.new "Hello!", "Hi there.", "gtk-dialog-info"
-nf.set_timeout 3000
-nf.set_urgency :critical
+nf.timeout = 3000
+nf.urgency = :critical
 
 # Show a button 'Test' in the notification, with a callback function.
 nf.add_action "test", "Test", Proc.new { |obj, action, user_data|