Add author_role to stream table
Store author email, display_name and login as meta
Store and use user_role_label meta
Deleted user UI
Additional role fallback and multisite fix
Merge branch 'develop' into issue-389
Empty default (just in case)
Fix wrong column name
Fix deprecated function and more fallback
Remove update routine

This is now done in #379.
Comment for user role label fallback mechanism
Merge pull request #413 from x-team/issue-389

Issue 389: Save additional author meta as Stream meta