Feedback for Beginner guide

I have some feedback for the beginner guide [0].

In the "What does a developer need to know about CSS?":

* i'd like that we mention some basics about re-usable components and
how to style them ("css architecture"), i think that what Nicolle
Sullivan wrote is perfect for this [1]
* Would be good that we show various use-case of CSS selectors and
basics (e.g. clearfix are bad, the + selector in a breadcrumb) [2]

I can help with some content on CSS architecture, that's my favorite
subject.

That is all, for now.

  [0]:
https://docs.google.com/document/d/17-kv5DM3t69DmpoTGeAQVSlZ2S_NHvQffyp73CX2BKg/edit
  [1]:
http://www.stubbornella.org/content/2010/06/25/the-media-object-saves-hundreds-of-lines-of-code/
  [2]: http://code.webplatform.org/gist/11454174

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Renoir
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