Fix #731: Allow RC2 to read .sjsir files from RC1.
Fix #716: Make System.err fallback to use console.log
Fix #726: Don't fire an SBT event when an error is logged
Merge pull request #736 from gzm0/fix-test-interface

Fix #726: Don't fire an SBT event when an error is logged
Merge pull request #732 from sjrd/allow-reading-rc1-stuff

Fix #731: Allow RC2 to read .sjsir files from RC1.
Merge pull request #733 from gzm0/fix-stderr

Fix #716: Make System.err fallback to use console.log