Vertx server: recreate HTTP client on ConnectException so that the dashboard continues to function when the Dropwizard server comes back up.
Added ability to detect when the proxy loses/regains connection to the remote Dropwizard server
Fade out page if Dropwizard server goes offline, fade back in if it comes back online
Merge pull request #2 from dmayo3/master

Cope with Dropwizard server downtime / restarts gracefully