Desirable
 - accept the free/busy information as a POST
 - more translations of the administration interface
 - translations of the website.
 - the ability to see a better list of event data in the admin interface
 - allow a specific CalDAV access permission to delegate free/busy viewability.
 - rename everything to "DAViCal"

Important
 - Fix the relationships code so relationships are controlled by the person
   affected (or the admin).
 - Implement draft-desruisseaux-caldav-sched specifications.

Minor
 - Remove the dependency on the 'general' user from the testing scripts.