[MCE] - slightly modified MCE from DECUS Europe F'89

The latest version of MCE from DECUS Europe is as good a command line editor
as has appeard for RSX.  I have put in a very minor hack to add a 'PAUSE' 
command. This command causes MCE to detach the terminal and execute a STOP. 
You UNSTOP it to resume MCE. This is very useful for those situations where
MCE gets in the way of other things you're trying to do. 

Thanks to DECUS Europe for producing the MCE program!

Jim Bostwick
Cargill Inc. 
Research Bldg.
Applied Math and Instrumentation
P.O. Box 9300 
Minneapolis, MN 55440