Major changes in 1.6.7
======================
This is a convenient release for people who want to have old
gnome 2.32 and new glib:
 * Do not build app lookup extension if we have glib >= 2.27.1

Other fixes:
* build: Adapt autogen.sh to libtool-2.4
* build: Bump fuse requirement for ATOMIC_O_TRUNC support