Upgrade grunt

Grunt upgraded to v0.4 and simplified a little. If anyone has grunt v0.3 installed they will need to uninstall it first with `npm uninstall grunt -g`. Then one time install grunt-cli: `npm install grunt-cli -g` to give global access to the `grunt` command.

From there you can install/develop with:
```shell
npm install
npm start
```

and build the static site to `dist/release/` with:
```shell
npm run build
```