Major Description
Some material on the Apache Geode website has gone stale, so let's update the page. Some suggestions:
- Replace the Clubhouse part with a pointer to the "Articles" page of the wiki: https://cwiki.apache.org/confluence/display/GEODE/Articles+and+Presentations
- Consider a reference to the Pivotal Open Source Hub channel: https://www.youtube.com/user/PivotalOpenSourceHub
- Replace the manually-maintained list of committers with a link to the authoritative source: https://projects.apache.org/committee.html?geode