[niepce] Update for new icon names in Gtk. Fix icon in About Dialog

[Hubert Figuière <hub src gnome org>]

commit 5bc6a099d06e44b8afb00ff66ad5808b2f24b86d
Author: Hubert Figuière <hub figuiere net>
Date:   Fri Jul 11 00:16:32 2014 -0400

    Update for new icon names in Gtk. Fix icon in About Dialog
    
    Add GPL 3 license to Gtk::AboutDialog.

 src/niepce/ui/niepceapplication.cpp |    4 +++-
 src/niepce/ui/niepcewindow.cpp      |    2 +-
 2 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/niepce/ui/niepceapplication.cpp b/src/niepce/ui/niepceapplication.cpp
index 60170d1..50e344b 100644
--- a/src/niepce/ui/niepceapplication.cpp
+++ b/src/niepce/ui/niepceapplication.cpp
@@ -67,8 +67,10 @@ void NiepceApplication::on_about()
 //    dlg.set_name("Niepce");
     dlg.set_program_name("Niepce Digital");
     dlg.set_version(VERSION);
+    dlg.set_logo_icon_name("camera-photo");
+    dlg.set_license_type(Gtk::LICENSE_GPL_3_0);
     dlg.set_comments(Glib::ustring(_("A digital photo application.\n\n"
-                                     "Build options: ")) + 
+                                     "Build options: ")) +
                      NIEPCE_BUILD_CONFIG);
     dlg.run();
 }
diff --git a/src/niepce/ui/niepcewindow.cpp b/src/niepce/ui/niepcewindow.cpp
index 3573d3f..319335c 100644
--- a/src/niepce/ui/niepcewindow.cpp
+++ b/src/niepce/ui/niepcewindow.cpp
@@ -160,7 +160,7 @@ NiepceWindow::buildWidget(const Glib::RefPtr<Gtk::UIManager> & manager)
 
     m_notifcenter.reset(new niepce::NotificationCenter());
 
-    Glib::ustring name("camera");
+    Glib::ustring name("camera-photo");
     set_icon_from_theme(name);
 
     m_notifcenter->signal_lib_notification.connect(