Starting to work on milestone v123

Change-Id: Ie86ea850907c090528c42f172d98ea7e6de8efa3
Fix for issue #332

In KitKat, the default behavior of GScaleGestureDetector has been change:
It will now enable by default the double-tap and slide to zoom. Which is
a bad behavior for us.

Change-Id: I91b4c36b5fea9c4b1632ca5201a462fa2d074ef9