Remove reference to bin/install_pip; pip and virtualenv are installed automatically if needed


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@14149 e27351fd-9f3e-4f54-a53b-843176b1656c
Adding test for import of events to attendee calendar (not working yet)


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@14150 e27351fd-9f3e-4f54-a53b-843176b1656c
Better TLS handling.


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@14151 e27351fd-9f3e-4f54-a53b-843176b1656c
Handle setting PARTSTAT of attendees across multiple instances when importing


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@14152 e27351fd-9f3e-4f54-a53b-843176b1656c
Clean up importing of attendee data


git-svn-id: https://svn.calendarserver.org/repository/calendarserver@14153 e27351fd-9f3e-4f54-a53b-843176b1656c