Added winston logging; updated logging message output; added code comments; added X-Response-Time header via Connect; others.
Finished implementin proxy_client.on(error) event code and removed 'res already sent' error bug, added more logging, added callback methods to fs.unlink() calls, added util.inspect(options) to proxy request options log statement to fix winston bug, fixed bug in cluster.on(disconnect) event log statement.
Added longjohn dependency to package.json
Added 2-way SSL/TLS client certificate authorization; revised HMAC authorization; corrected error audit-logging bug from cyclical error instance being logged; added "503/Service Unavailable" response to proxy_client request error event; added content-type to error responses; revised error response body texts; removed longjohn dependency.
Added round-robin load-balancing for multiple hostname, path routes.
Removed load-balancing debug output.
Add server.timeout and callback to http.server instance for 4.4.1 bug fix.
Merge pull request #10 from JohnWMay/VLER-DAS-4.4.1

Vler das 4.4.1
Corrected incorrect audit stream file MIME-type value of "octlet-stream" to be "octet-stream" in the getContentType method in gateway.js.
Merge pull request #13 from JohnWMay/VLER-DAS-4.4.1

Corrected incorrect audit stream file MIME-type value of "octlet-stream"...