Add accels to quit (#111)

Author: teamcons

src/Application.vala

@@ -36,6 +36,11 @@ public class Badger.Application : Gtk.Application {
         Intl.bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
         Intl.bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
         Intl.textdomain (GETTEXT_PACKAGE);
+
+        var quit_action = new SimpleAction ("quit", null);
+        add_action (quit_action);
+        set_accels_for_action ("app.quit", {"<Control>q"});
+        quit_action.activate.connect (quit);
     }
 
     protected override void activate () {