Give open device ports their own options. Preparing for future refactor.

lib/units/device/plugins/connect.js

@@ -20,7 +20,7 @@ module.exports = syrup.serial()
       , plugin = Object.create(null)
       , activeServer = null
 
-    plugin.port = options.ports.pop()
+    plugin.port = options.connectPort
     plugin.url = util.format('%s:%s', options.publicIp, plugin.port)
 
     plugin.start = function() {

lib/units/device/plugins/screen/options.js

@@ -6,7 +6,7 @@ module.exports = syrup.serial()
     var plugin = Object.create(null)
 
     plugin.devicePort = 9002
-    plugin.publicPort = options.ports.pop()
+    plugin.publicPort = options.screenPort
     plugin.publicUrl = _.template(options.screenWsUrlPattern)({
       publicIp: options.publicIp
     , publicPort: plugin.publicPort