Ported Jay's pid_exists() code based on kill() from OS X to Linux.
Ported Jay's pid_exists() code based on kill() from OS X to Linux.


git-svn-id: 9f18dd852162ff6c59c5533c0914e9cf81af9e7c@140 d8a29897-7e4b-0410-a74a-8bb4c295346f

elventear/psutil,elventear/psutil