version 3.15.4
 - Ignore intermediate file with Automake 1.15
 - Removed obsolete variables in autogen.sh
 - um-crop-area: Fix deprecated API usage
   https://bugzilla.gnome.org/show_bug.cgi?id=742530
 - um-crop-area: Enforce a minimum size
   Otherwise, if callers aren't careful, users could resize us so small
   that we'd crash inside gdk_pixbuf_scale() .
   https://bugzilla.gnome.org/show_bug.cgi?id=742530
 - um-crop-area: Fix background rendering around the picture
   Instead of trying to fill the displayed pixbuf with the background
   color (and failing at that), just make the pixbuf be an aspect correct
   scaled size of the original picture and draw it at the correct offset
   on the draw vfunc.
   This allows us to get rid of deprecated gtk+ API usage and fixes the
   background around the picture ending up black despite de code's
   intent.
   https://bugzilla.gnome.org/show_bug.cgi?id=742530