[[ api ]] ping command added.

This can be used to check if the server is up and working.

Author: soapdog

src/api/ping.js

@@ -0,0 +1,7 @@
+const lori = require("lori")
+
+function ping(_useless, callback) {
+    callback(null, "pong")
+}
+
+module.exports = ping