Checkpoint changes: move sharing invitations into the store. Major api changes and clean-up done. Still need to rework address books/group
sharing some more to simplify that api.


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@11960 e27351fd-9f3e-4f54-a53b-843176b1656c
Typo


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@11961 e27351fd-9f3e-4f54-a53b-843176b1656c