New statistics: lastLogin, lastMessageSentAt, lastSeenSubscription, migration, version, branch and tag

view renders oembed in msg - even if msg type is 'rm'

Fix for #1411 and #1407. Corrected the malreferenced variables, was not able to verify #1407 as being fixed since there wasn't clear instructions on how to replicate.

Update message pinning to show up on the tab list with a few options to allow/disallow it and whether to allow anyone to pin messages

This change also alters how edits are displayed both for sequential
and non-sequential messages.

See #1357

Added user method for searching users from same domain