Change: remove xprof.io related nginx config

 * backup in xprof.io
Update: backup env/php conf for xhprof.io
Enhancement: add support for server_name to easybib_nginx
Enhancement: support discover_api app
Clean-up: whitespace, old configuration
Change: only use nginx-app::api outside of AWS

 * nginx configuration is written during the deploy
 * this allows us to leverage settings from an application on opsworks
Bugfix: template > config_template
Enhancement: set document_root for each application
Enhancement: find a semi-sensible approach to failover for 'default router'
Merge pull request #131 from till/topics/deploy-discover-api

Topics/deploy discover api