Add new view for the checkboxes.

View for the checkboxes is added in this PR.

@auraz, @cahrens please review.

See screenshots:
![screen shot 2013-12-26 at 13 41 24](https://f.cloud.github.com/assets/1247491/1810409/4268a4f8-6e23-11e3-9a62-4467043133c0.png)
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![screen shot 2013-12-26 at 13 45 13](https://f.cloud.github.com/assets/1247491/1810410/427dcf7c-6e23-11e3-9df3-0552237ddd84.png)