ACTION-66: Review amount of explanatory text on new CG home page

2013-01-24:
* Sorin will add a "Read more" handler below the 1-sentence intro. The text in the expanded handler will be the 2 paras below + a link to the about page for more.

* Sorin will also add modal to the "Success" portion of the diagram, with "Learn more about Community and Business Groups" with a link to the about page.

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Text for home page top:

A W3C Community Group is an open forum, without fees, where Web developers and other stakeholders develop specifications, hold discussions, develop test suites, and connect with W3C's international community of Web experts.

A W3C Business Group gives innovators that want to have an impact on the development of the Web in the near-term a vendor-neutral forum for collaborating with like-minded stakeholders, including W3C Members and non-Members.

Learn more <a href="/community/about/">about Community and Business Groups</a>.
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