Since we currently implement only half of the XEMBED protocol (we lack
the container part), we use a simple XEMBED container built with Gtk+
and PyObject. Using an interpreted language as Python helps us avoiding
a build dependency on Gtk+.
Change-Id: Ibc6282371c6f767e481c8a8ba2b5ca9cdd0d8b82
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>