[kronolith] Add event from email

[Chuck Hagenbuch]

Quoting Nazar <nazarius at ukr.net>:

>   And $content->getAttribute('UID') return 'kronolith:<event's ID in 
> owner's calendar>'

Yup. We need to figure out a better way to track GUIDs. This is on the
MissingFeatures page on the Wiki, but please make sure a bug on bugs.horde.org
covers it as well.

-chuck

--
"Regard my poor demoralized mule!" - Juan Valdez