The 2 columns of the History list are now of the same width, can't be

resized, and display a tooltip.

The ICM tool has been reworked to avoid loosing space.

The curve's histogram are now displayed.

For Windows users, if you can't build the Gtk3 branch anymore with your
Gcc5.x compiler, try to uncomment line 20-21 of the main CMakeLists.txt.
For some reason, I had to comment that out.

rtgui/preferences.cc

@@ -16,7 +16,14 @@
  *  You should have received a copy of the GNU General Public License
  *  along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
  */
+
+// class_slot is no longer part of the sigc++ source tree, but starting from which version ?
+#if 1
+#include <sigc++/slot.h>
+#else
 #include <sigc++/class_slot.h>
+#endif
+
 #include "preferences.h"
 #include "multilangmgr.h"
 #include "splash.h"