Enhancement: new recipe for Apache CouchDB

Related: easybib/issues#2873
Enhancement: configure CouchDB using local.d/foo.ini
Merge pull request #544 from till/t/apache-couchdb

Enhancement: new recipe for Apache CouchDB
Enhancement: add PHP intl extension to role-nginxapp
Merge pull request #545 from yitznewton/t/add-php-intl-to-www

Enhancement: add PHP intl extension to role-nginxapp
Merge pull request #546 from till/master

Update stable