Updated the front page to highlight Meetup list

* The meetup list is for announcements and job postings
* The Google group is for discussions and asking for help
Note the google group in getting local help
Added a license file (CC by 3.0)
Merge pull request #26 from davidfischer/google-group-deemphasis

Google group deemphasis
Merge pull request #27 from davidfischer/license

Added a license file (CC by 3.0)