Add dev and build npm scripts

package.json

@@ -12,6 +12,10 @@
   "bin": {
     "terminalizer": "bin/app.js"
   },
+  "scripts": {
+    "dev": "NODE_ENV=development webpack --watch",
+    "build": "NODE_ENV=production webpack --optimize-minimize --progress --colors"
+  },
   "keywords": [
     "terminal",
     "record",