Fix title, move note about clone to top
Fix fix of title
Merge branch 'develop' of https://github.com/hypothesis/h into zimeon_doc_fixes2
User search was broken with redacted annotations

With the page search you can search for the username, but for redacted annotation the user filter gives back a null as a username, and we tried to convert this to lowercase()

Fixes #1160
Note version issues with homebrew elastic search, mark elasticsearch as optional
Cosmetic only: simplify code
Merge pull request #1163 from zimeon/zimeon_doc_fixes2

More minor tidy of OSX docs
Change sauce credentials to new OSS account
Switch to pyramid_multiauth

Simplify the interaction between annotaton.auth and horus by using
pyramid_multiauth and creating a separate authentication policy for
the annotator auth token.