Merge branch 'activity_feed' of github.com:metabase/metabase-init into activity_feed

...ces/frontend_client/app/home/components/Activity.react.js

resources/frontend_client/app/home/components/Cards.react.js

src/metabase/api/activity.clj

src/metabase/events/view_log.clj

src/metabase/models/user.clj

test/metabase/api/activity_test.clj

test/metabase/events/activity_feed_test.clj

test/metabase/events/view_log_test.clj