Adds electron-packager and a build task

out/.gitignore

@@ -0,0 +1 @@
+*

package.json

@@ -6,6 +6,7 @@
   "scripts": {
     "start": "electron index.js",
     "rebuild": "electron-rebuild",
+    "build": "electron-packager . --all --out=out --ignore=node_modules/electron-*",
     "test": "mocha"
   },
   "repository": {
@@ -41,6 +42,7 @@
   },
   "devDependencies": {
     "chai": "^3.5.0",
+    "electron-packager": "^7.0.3",
     "electron-prebuilt": "^0.36.9",
     "electron-rebuild": "^1.1.3",
     "mocha": "^2.4.5"