Bug 930808 - Upgrade to psutil 2.1.3; r=glandium

psutil 2.1.3 is replacing psutil 1.0.1. There are numerous bug fixes and
feature enhancements in psutil worth obtaining.

Source code was obtained from
https://pypi.python.org/packages/source/p/psutil/psutil-2.1.3.tar.gz and
uncompressed into python/psutil without modification except for the
removal of the egg-info directory and the .travis.yml file.

python/psutil/examples/who.py

@@ -7,9 +7,14 @@
 """
 A clone of 'who' command; print information about users who are
 currently logged in.
+
+$ python examples/who.py
+giampaolo       tty7            2014-02-23 17:25  (:0)
+giampaolo       pts/7           2014-02-24 18:25  (:192.168.1.56)
+giampaolo       pts/8           2014-02-24 18:25  (:0)
+giampaolo       pts/9           2014-02-27 01:32  (:0)
 """
 
-import sys
 from datetime import datetime
 
 import psutil
@@ -17,14 +22,13 @@ from psutil._compat import print_
 
 
 def main():
-    users = psutil.get_users()
+    users = psutil.users()
     for user in users:
-        print_("%-15s %-15s %s  (%s)" % \
-            (user.name,
-             user.terminal or '-',
-             datetime.fromtimestamp(user.started).strftime("%Y-%m-%d %H:%M"),
-             user.host)
-        )
+        print_("%-15s %-15s %s  (%s)" % (
+            user.name,
+            user.terminal or '-',
+            datetime.fromtimestamp(user.started).strftime("%Y-%m-%d %H:%M"),
+            user.host))
 
 if __name__ == '__main__':
     main()