Dropping the webpack dev server in favour of two watch commands.

This has the downside that the nwjs instance doesn't automatically
reload when changes are made, but we can use the same file (index.html)
instead of two different ones.

package.json

@@ -21,10 +21,10 @@
     ]
   },
   "scripts": {
-    "watch": "tsc --watch",
+    "watch": "concurrently --kill-others \"npm run watchjs\" \"npm run watchcss\"",
+    "watchjs": "webpack --watch",
     "watchcss": "scss -I node_modules/bulma/ --watch sass/app.scss:public/delila.css",
     "build": "NODE_ENV=production webpack",
-    "dev": "webpack-dev-server --progress --colors --inline --hot --no-info --content-base public/",
     "test": "standardts && jest",
     "testnocache": "standardts && jest",
     "dist": "build --tasks win-x86,win-x64,linux-x86,linux-x64,mac-x64 --mirror https://dl.nwjs.io/ .",
@@ -50,6 +50,7 @@
     "babel-loader": "^6.4.0",
     "babel-preset-es2015": "^6.24.1",
     "babel-preset-es2016": "^6.24.1",
+    "concurrently": "^3.4.0",
     "css-loader": "^0.27.2",
     "extract-text-webpack-plugin": "^2.1.0",
     "jest": "^19.0.2",
@@ -62,8 +63,7 @@
     "ts-jest": "^19.0.0",
     "ts-loader": "^2.1.0",
     "typescript": "^2.3.4",
-    "webpack": "^2.6.1",
-    "webpack-dev-server": "^2.4.5"
+    "webpack": "^2.6.1"
   },
   "repository": {
     "type": "git",