Changelog:

Core
* Show error page when package is incorrect.
* Support kiosk mode.
* Enable experimental WebKit features by default.
* Enable executing a node script on startup by specifying 'node-main' in package.json.
* Add App API.
* Implement support for datalist tag.

Mac
* Fix support for node.js native modules.
* Fix the version string.
* Automatically focus on web view when window is focused.

Linux
* Webview now gets default focus.