Task: Set up cron so actions requiring cron occur promptly and visitors don't experience a page load slowed down by cron tasks

Right now "Automatic Cron" (the politically-correct renaming of Poor Man's Cron when it went into core) is enabled on Drutopia sites, including on the Drutopia Platform.

Instead, part of the setup for all sites on the platform should include setting up cron to run every five to fifteen (i favor more often but i'm not sure how much resources Drupal spends checking and confirming there's nothing to cron, which will be the case most of the time), and we should disable the Automatic Cron module (we'll probably want to develop a "Drutopia Platform" feature module for this, i think, but anyhow Chris don't worry about this part).