2.29.11:

* Gio::AppInfo:
 - launch(): Use a vector instead of a ListHandle and assume that it contains
 Gio::File rather than strings. This was unusable before.
 - Add launch() overload with no launch_context parameter.
 - Add launch() overload taking one file,
 - launch_uri(): Deprecate the method taking a GAppLaunchContext*, adding
   one taking a Gio::AppLaunchContext instead.
 - Add launch_uri() taking one URI.
 (Murray Cumming)
* Add test case for a recent fix in libsigc++ with RefPtr.
 (Kjell Ahlstedt) Bug #564005#c14 (Alexander Shaduri)
* tools: Add python .def generation scripts removed from PyGObject.
 (Murray Cumming)
* gmmproc: Allow _STRUCT_NOT_HIDDEN to be used even when multiple classes
 are defined in one file.
 (José Alburquerque)