Idea for static tester on all the samples

@jjinux What are you thoughts on hooking up all the samples to the `dart_analyzer`?  

The goal here would be to have better notification when bit rot starts to happen with the samples. For example check out this [build](https://drone.io/github.com/financeCoding/dart-html5-samples/4), scroll to the end. 

`test/web_static_analyzer.dart` would be the driving script to test all samples inside of web. As of now it scans the `.html` files for `<script>` dart application. A better approach might be to use a json config file.  

Run locally

```
dart test/web_static_analyzer.dart -d $DART_SDK/bin/dart_analyzer
```