-!!! timed-out interactive tasks !!!
-lepsi time limity
-zkopirovat *.ok i kdyz program spadne na run-time error
-konfigurovatelne vstupni a vystupni soubory
-konfigurovatelny pristup k timerum a /proc/self/stat (pripadne /proc/self/fd)
-better formatting of the score table
-online ukazovani runtime a memory
-score: alignment of table cells
-input files shouldn't be mandatory (esp. for interactive tasks)
-stdio tasks: don't allow them to read the files
-interactive tasks: allow logging to the main log?