+
+Various ideas:
+scores dependent on time (like PL olympiad)
+box: limit the total amount of data written to files, so that quotas don't have to be set up
+
+TomGav
+~~~~~~
+recursive try-ln for dir input
+clean and well-defined expansion (beware of per-test re-expansion)
+configurable names of in/out files (independent of $PROBLEM)
+paranoidly check file mode/owner before running the sandbox