made the test your lab page a little better

Was using the "test your lab" page, decided to touch the CSS up a bit. looks a little better now and is slightly more functional (longer text boxes, uses monospace font within text boxes, aligns properly)

Old version:
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![worse](https://cloud.githubusercontent.com/assets/1694861/3084441/ce792a86-e4f6-11e3-850a-51d7aa4b4d00.png)

New version:
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![better](https://cloud.githubusercontent.com/assets/1694861/3084442/d1d6783c-e4f6-11e3-85c9-df9bf78ef937.png)

Hope this helps