Adds user confirmation rake task (#1300)

* Adds task to confirm user by email.

* Adds documentation for manual confirmation.

Merge pull request #1146 from tootsuite/fix-object-type-nil-exception

Fix nil#object_type error

Remove bios from blocked users list, filter out broken entries from A…

…PI response

Fix statsd null backend not being initialized properly

Fix live status removal from public/hashtag channels

Improve how errors are displayed in the UI

Add information on rake tasks to readme

Don't generate stream entries for streamables of remote accounts

Various bug fixes and improvements

Fixes after first live deployment