Web site maintenance

Doing some maintenance on the web site to get page builds working again. It may be down briefly if I mess this up. I hope this will not be a huge problem for anyone on a Friday night :slight_smile:

This is done, and http://druid.io/ is now up to date! So many events that are in the future and not the past.

In the future, please submit pull requests to the “src” branch of https://github.com/druid-io/druid-io.github.io. I made this the default branch for clones and PRs in order to make things easier. Charles’s build bot will read from that branch and write HTML to master, which will then get published on the site.