fixes memory leaks when deleting data
fixes parsing, allows removal of params
get rid of special version and property handling.
grouped properties: name as group.property to prevent name collision
adds first two commands: write and new
compose name from N field (first and last name only)
set and create group and params
edit property value and param value
adjust default mtpt -> /mnt/vcard
adds export stub file, default database at /usr/$user/lib/vcarddb.vcf