Fixed react hot reload plus a few other things

app/script/mqtt.ts

@@ -1,5 +1,5 @@
-import "paho-mqtt/mqttws31";
 /// <reference path="./paho-mqtt.d.ts" />
+import "paho-mqtt/mqttws31";
 import MQTT = Paho.MQTT;
 
 import { EventEmitter } from "events";
@@ -15,7 +15,7 @@ export class MqttApiClient extends EventEmitter implements SprinklersApi {
 
     constructor() {
         super();
-        this.client = new Paho.MQTT.Client(location.hostname, 1884, MqttApiClient.newClientId());
+        this.client = new MQTT.Client(location.hostname, 1884, MqttApiClient.newClientId());
         this.client.onMessageArrived = m => this.onMessageArrived(m);
         this.client.onConnectionLost = e => this.onConnectionLost(e);
     }

webpack.config.js

@@ -5,9 +5,11 @@ const HtmlWebpackPlugin = require("html-webpack-plugin");
 module.exports = {
     entry: [
         "react-hot-loader/patch",
+        "webpack-dev-server/client?http://localhost:8080",
+        "webpack/hot/only-dev-server",
         "./app/script/index.tsx"
     ],
-    devtool: "sourcemap",
+    devtool: "inline-source-map",
     output: {
         path: path.resolve(__dirname, "dist"),
         filename: "bundle.js"
@@ -32,12 +34,7 @@ module.exports = {
         new webpack.NamedModulesPlugin(),
         new webpack.HotModuleReplacementPlugin()
     ],
-    externals: {
-        "react": "React",
-        "react-dom": "ReactDOM"
-    },
     devServer: {
-        hot: true,
-        contentBase: "./dist"
+        hot: true
     }
 };