Use Karma CLI, fix Exoskeleton support, use Hapi instead of Express

- Removed unnecessary lesshat bower component
- Added jake tasks for easily adding and removing Swag
- Bumped Chaplin down to ~1.0.0 for proper Exoskeleton support
- Added karma-cli as test dependency and removed karma fix jake task
- Swap out Express for Hapi for happier development (and no cookies)
- Fix a bug where mocha assets piped to app.css when test stuff installed
Defaults to port 80 according to the [`Server` API Reference](http://hapijs.com/api#new-serverhost-port-options). As with Express, we pass through the [`port` setting](https://github.com/brunch/brunch/blob/stable/docs/config.md#server) from `brunch-config.js`.