remove env variable in npm scrpts; rename watch script for clarity

watch.js

@@ -0,0 +1,33 @@
+/* eslint no-console: 0 */
+
+process.env.SCRIPT = 'watch';
+
+var webpack = require('webpack'),
+    webpackDevMiddleware = require('webpack-dev-middleware'),
+    webpackHotMiddleware = require('webpack-hot-middleware'),
+    browserSync = require('browser-sync');
+
+var devBuildConfig = require('./webpack.config'),
+    config = require('./config'),
+    compiler = webpack(devBuildConfig);
+
+browserSync.init({
+  proxy: {
+    target: config.devUrl,
+    middleware: [
+      webpackDevMiddleware(compiler, {
+        publicPath: devBuildConfig.output.publicPath,
+        stats: {
+          colors: true
+        },
+      }),
+      webpackHotMiddleware(compiler, {
+        log: browserSync.notify
+      })
+    ]
+  },
+  files: [
+    'templates/**/*.php',
+    'src/**/*.php'
+  ]
+});