No bug - Removed documentation for the now dead old middleware.
fixes bug 1052727 - Signature summary to support returning multiple reports, r=@AdrianGaudebert
fix bug 1054078 - match Mac OS X on Darwin%
Merge pull request #2298 from rhelmer/bug1054078-match-darwin-to-mac-os-x

fix bug 1054078 - match Mac OS X on Darwin%
Merge pull request #2297 from AdrianGaudebert/docs-remove-old-mware-doc

No bug - Removed documentation for the now dead old middleware.
Fixes bug 1010032 - Added documentation about Elasticsearch and features based on it. r=bramwelt