Separate device functionality into plugins.

lib/roles/device/plugins/router.js

@@ -0,0 +1,15 @@
+var syrup = require('syrup')
+
+var wirerouter = require('../../../wire/router')
+
+module.exports = syrup()
+  .dependency(require('./sub'))
+  .dependency(require('./channels'))
+  .define(function(options, sub, channels) {
+    var router = wirerouter()
+    sub.on('message', router.handler())
+    router.on('message', function(channel) {
+      channels.keepalive(channel)
+    })
+    return router
+  })