Add githubs

* Switch to alphabetical order (with exception of CfA) to avoid any contests over ordering
* Made titles more human-readable and less lowercase
* Add mySociety (for FixMyStreet and others)
* Add OpenCivicData (for scraping frameworks and other infrastructure)
* Add Open North (for Represent, Citizen Budget, etc.)
* Add Project Open Data (for handy tools like CSV-to-API and DB-to-API)
* Add Sunlight Labs (for scraping frameworks and tons of others)