Reference dev script in start script instead of copy pasting (#894)

Less duplication FTW.

Author: robwierzbowski

template/package.json

@@ -6,7 +6,7 @@
   "private": true,
   "scripts": {
     "dev": "node build/dev-server.js",
-    "start": "node build/dev-server.js",
+    "start": "npm run dev",
     "build": "node build/build.js"{{#unit}},
     "unit": "cross-env BABEL_ENV=test karma start test/unit/karma.conf.js --single-run"{{/unit}}{{#e2e}},
     "e2e": "node test/e2e/runner.js"{{/e2e}}{{#if_or unit e2e}},