[iagno] Add tooltip to new game button

[Michael Catanzaro <mcatanzaro src gnome org>]

commit df650251ba9ba14a6f0ceddfb298a6b273020532
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sun Feb 16 10:07:56 2014 -0600

    Add tooltip to new game button

 src/iagno.vala |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/iagno.vala b/src/iagno.vala
index 7aba64a..309f378 100644
--- a/src/iagno.vala
+++ b/src/iagno.vala
@@ -161,6 +161,7 @@ public class Iagno : Gtk.Application
         new_game_button.valign = Gtk.Align.CENTER;
         new_game_button.relief = Gtk.ReliefStyle.NONE;
         new_game_button.action_name = "app.new-game";
+        new_game_button.tooltip_text = _("Start a new game");
         side_box.pack_end (new_game_button, false, false, 0);
 
         start_game ();