Move dev commands into its own script.

app/package.json

@@ -5,7 +5,7 @@
   "main": "main.js",
   "scripts": {
     "start": "./node_modules/.bin/electron main.js",
-    "dev": "npm run compile && npm run gulp && ./node_modules/.bin/electron main.js -d",
+    "dev": "bash ./scripts/dev.sh",
     "gulp": "./node_modules/.bin/gulp",
     "compile": "sh ./scripts/compile.sh",
     "install": "./node_modules/.bin/electron-rebuild",

app/scripts/dev.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# compile main process code
+cd ..
+npm run compile
+cd ./app
+
+# compile renderer process code
+npm run compile
+
+# compile LESS and pack javascript
+npm run gulp
+
+# start app with dev flag
+./node_modules/.bin/electron main.js -d