Merge branch 'matteoaquila-master'

Do not store last visited URL from API controllers (mastodon#1330)

Sign-in redirects you back to last visited URL, but in case of API requests,
this sometimes redirected users to an API URL that, of course, greeted them
with an {"error":"The access token is invalid"}

Merge pull request mastodon#1146 from tootsuite/fix-object-type-nil-e…

…xception

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