COOPR 542: Add ability to configure UI to use TLS

SSL/TLS implemented for coopr-ui.
```
var port = COOPR_UI_PORT,
      httpServer = http.createServer(app);
if(COOPR_SSL) {
   httpServer = https.createServer(app);
   port = COOPR_UI_SSL_PORT;
}
httpServer.listen(port, null, null, function() {
   console.info(httpLabel + ' listening on port %s using %s protocol', port, COOPR_SSL ? "https" : "http");
});
```
duck typing FTW.