tree e245be0d7b702288535fa3b155c42fea45d4341d
parent 59245aaf380d80844aa791a7e042746f68207c8c
author Zhenkai Zhu <zhenkai@cs.ucla.edu> 1348704704 -0700
committer Zhenkai Zhu <zhenkai@cs.ucla.edu> 1348704704 -0700

use signal for removal; send hello at beginning