Add `title` Attribute to View Tree Cells

Long names of classes tend to trail off in the DIV cells. This change adds a `title` attribute with the full name of the object in question.

Preview
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![preview](https://cloud.githubusercontent.com/assets/3300/3004805/7ecc9a68-ddbc-11e3-9032-a2f1b2556440.png)

TODO
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- [x] Add tests (Can someone point me in the direction to do this? I'm still figuring the layout of this project out)
- [ ] Manual testing in Firefox

Open Questions
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- [x] Is there a way to add the `title` attribute as an unbound property? I imagine this is probably a good idea for performance reasons.