Add Sabre VObject 3.0.0 beta 3
Use VObject to parse vCard files from the server
Fix some parsing issues

Old vcard.php code was still being used
Upgrade Sabre VObject to 3.0.0
Fix label retrieval

TYPE parameter wasn't being read properly
Use Sabre VObject when creating and modifying contacts and groups

Almost fully functional. Needs some work on groups when assigning labels.
Fix problem with department and organization

Changing/adding a department was overwriting the organization property
Remove mentions to vcard.php
Fix group name generation when setting labels
Fix empty ORG property

ORG was being set empty if no organization/department was specified
Fix two problems with addresses

Addresses were being duplicated when saving a contact, and their labels weren't
being set.
Add one more check for empty organization

'Organization' is passed empty when no value was specified, so its length
has to be checked
TODO: create real preemptive authentication
implement preemptive authentication for working around broken ownCloud
Merge pull request #10 from adobo/sabrevobject

Switch to Sabre VObject for vCard parsing/creating
update localization with preemptive auth texts; add russian and ukrainian
Merge branch 'preemptive-auth' into dev
honor preemptive_auth setting when adding new addressbooks
correctly check if preemptive authentication is requested when adding a new addressbook. Thanks to @m3m0ryh0l3 for reporting.
Use utf8 charset for MySQL tables.