The only thing in helpers.py that needed vars.py was the log stuff.

So put it in its own file.  Now it's safer to import and use helpers even if
you can't safely touch vars.

redo-oob.py

@@ -1,7 +1,7 @@
 #!/usr/bin/python
 import sys, os
 import state
-from helpers import err
+from log import err
 
 if len(sys.argv[1:]) < 2:
     err('%s: at least 2 arguments expected.\n' % sys.argv[0])