Extending existing overlay feature to unauthenticated users

[peter hartmann]

Extending the existing calendar overlay feature to unauthenticated users would
greatly help those using SchoolTool for public calendaring. We at our
parish/school have a few different public calendars for sub-organizations and
keep track of a lot of holidays. It would be great to have these different
calendars viewable from one unauthenticated account. I think it should work
like this: if the authenticated have privileges to see other calendars as
overlays, so should unauthenticated (if the unauth. have privileges to view of
course). I think it's great that SchoolTool remembers the view setting for
overlays. But since unauthenticated users are anonymous the setting would have
to saved with a cookie. I can't see this change offending any current users
since having an account viewable to the unauthenticated user pretty much insures
it's not a personal account.