Kill the lizard

In tonight's dinstall run, new versions of epiphany and yelp will enter unstable, built against xulrunner. This means that finally, gnome will be installable without a mozilla-browser dependency. Packages using XUL are now linked to correctly versioned libraries, that also use the system versions of libraries wherever possible. This is hopefully the end of a long-standing history of various problems with mozilla.

Thanks a lot to glandium for his huge work on xulrunner.