writing of verdicts to stdout (include timing and check on interactive tasks, including judge errors)
box: memory usage statistics (need to search for VMPeak in /proc/$PID/status, but it disappears too early)
+Judges
+~~~~~~
+integrate to the top-level makefile
+clean up exit codes
+
Environment
~~~~~~~~~~~
fpc: add switch -gl (runtime errors write line#), but avoid that when inside the sandbox