This lays the groundwork for the new collections feature. See the API
documentation for details. There is still some pending tasks before this
is totally ready, see the development board.
test plan: no UI yet, but you can make api calls to add/edit/delete
collections, add/edit/delete items, and upvote items.
Change-Id: I8fa019d428d1aae3ac62b1f34ebe2ac3c77310be
Reviewed-on: https://gerrit.instructure.com/10465
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Simon Williams <simon@instructure.com>
Brian Palmer