Revert "Revert "Changed Showdown Rules link to ours""

This reverts commit 5560a32c4d5b36d071837f5e1a0e6117e65bd666.
Revert "Revert "*Hopefully* fix recent errors and crashes""

This reverts commit f592dfbc57ab56b52f5edcb6fd446dbe4afb0d2c.