dependencies should be installed during install
do not sync collections

If a carddav server provides the address book as a collection (in addition to
single vcards) the collection gets imported as a single vcard containing the
entire address book which messes up pc_query search results.

Signed-off-by: Christian Geier <geier@lostpackets.de>
fix deletion of unambiguous items

Signed-off-by: Christian Geier <geier@lostpackets.de>