Added tm.com link, minor article formatting, style tweaks.

Not a major PR, but added a link to tm.com as suggested, formatted some articles that were not using headers properly, and redid block quote styling.

![screen shot 2014-12-16 at 9 05 57 pm](https://cloud.githubusercontent.com/assets/222170/5465554/ac0fb2b4-8567-11e4-847f-2021c8d5e8cb.png)

@joshfinnie - lmk!