Metabase 0.22.0

New Features

#4052 - Collections + Collection Permissions
#3364 - Allow multiple aggregations
#3365 - Expression aggregations
#3682 - Provide a JSON download of a saved question

Bug Fixes

#3910 - Date Filter : Next | Previous (Week/Month/etc) can't be set at 2 (0.21.0)
#3810 - Option for downloading CSV with no rows limit
#4091 - Saving a named custom expression gives blank screen
#3965 - Metabot / slack bot doesn't start

Complete list of issues -
https://github.com/metabase/metabase/issues?q=milestone%3A0.22
.0+is%3Aclosed