Configurable auto-refresh, q to quit, documentation

AstonKem, 
Thanks for the great emacs script. Please consider this patch which I believe adds some useful features. 

1. Added auto-refresh of butler status buffer.  Auto-refresh feature can be switched on or off with customizable variable, or it can be toggled with the "a" key.
2. Added butler-quit, bound to "q"
3. Wrote documentation for all interactive functions.