Converting to Drupal 7

I’ve been away from the observatory and this web site for almost a year for various reasons. On return, I found the web site messed up badly – changes at the ISP (PHP upgrades) were incompatible with the now-obsolete version of Drupal running the site. So, as part of getting the observatory back on the air, I’ve upgraded this site to Drupal version 7. That broke a lot of things, so gradually rebuilding.