A lot of jrun fixes.

Review Request #170 - Created March 19, 2011 and submitted

Bogdan-Cristian Tătăroiu
- Made jrun work on both 32-bit and 64-bit linux machines.
- Updated list of system calls to kernel version 2.6.33.
- Fix the trouble we were having with determining memory usage.
Previously, we only extracted it from /proc and if the process
finished too fast then we didn't have time to determine it. Now we
just use rusage the same way we use it for execution time.
This diff is from July 1st, I don't remember. :)
Savin  Tiberiu
Bogdan-Cristian Tătăroiu
Review request changed

Status: Closed (submitted)