Default to Solitude URL in documentation
fix feed element search view for certain versions of ES
Merge pull request #2316 from ngokevin/feedfuzzy

fix feed element search view for certain versions of ES
Commit from Mozilla Verbatim by user ibai@oihanguren.com.: 1327 of 2035 strings translated (0 fuzzy).
Merge branch 'master' of ssh://github.com/mozilla/zamboni
Commit from Mozilla Verbatim by user ibai@oihanguren.com.: 1329 of 2035 strings translated (0 fuzzy).
Updated to use official elasticsearch client lib (bug 1036164)

This removes most uses of pyelasticsearch in favor of the official
elasticsearch client library.
Added urllib3 as elasticsearch dependency
Remove the 'Category' model, use constants instead (bug 987880)
Merge pull request #2291 from diox/flat-categories

Remove the 'Category' model, use constants instead (bug 987880)
Bump migration (bug 987880)
MySQL doesn't like longtexts with default value (bug 987880)
Escalate reviews for apps with prerelease permissions (bug 1036921)