This library should contain logic for searching, filtering and sorting icalendar
data, as well as logic for storing and representing an icalendar search query.

Audience:
- This will be used for the python CalDAV client library, both for bundling
  search parameters together in one object, for doing client-side filtering when
  the server does not support the desired search query.
- This may be useful in any kind of software handling collections of calendar
  content and needing to do filtering or searches on it.
- This may also be useful by calendar server developers.