Adding schema entries to libgnome

[Kjartan Maraas <kmaraas broadpark no>]

Hi.

I've got a few bugreports in bugzilla asking to add more schema entries
for various stuff in libgnome and wanted to check whether this still is
considered the place to do that or if we should avoid adding more
API/ABI to these libs.

I guess we need to migrate the lot of them if we are to get rid of
libgnome some day anyway so adding a few more doesn't really add that
much of a burden.

Other than that it would be nice to get some feedback on the patches
themselves just so I don't add stuff prematurely.

- lockdown: Restrict Application Launching, default schema ...
http://bugzilla.gnome.org/show_bug.cgi?id=395887

- Add schemas for search tool preferred application
http://bugzilla.gnome.org/show_bug.cgi?id=491647

- Add default application keys for "calendar" and "tasks"
http://bugzilla.gnome.org/show_bug.cgi?id=497180

- need schemaentry for gtk-modules xsetting
http://bugzilla.gnome.org/show_bug.cgi?id=507385

Cheers
Kjartan