Convert to ES5, add web server

* No compilation step
 * Beginnings of web interface
 * Simple express server; React-based frontend
 * CommonJS style across codebase; auto-converts to RequireJS for browser
 * Using diffsync for realtime UI
 * "Provider" -> "Plugin"
 * Plugins expose one or more Providers

example-plugins/homebridge-lockitron/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "plugin-lockitron",
+  "version": "0.0.0",
+  "description": "Lockitron Support for HomeBridge",
+  "license": "ISC",
+  "keywords": [
+    "homebridge-plugin"
+  ],
+  "peerDepdendencies": {
+    "homebridge": ">=0.0.0"
+  },
+  "dependencies": {
+    "basic-request": "^0.1.1"
+  }
+}