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The purpose of this file is to describe how to add new dialects and
languages to ESS.
 
The code is divided into 4 types of functionality.

ess-*.el   : described the underlying mechansim
essl-*.el  : language specific considerations
essd-*.el  : describe dialect  and process specific modifications.
	     This should also contain the language specific interface
	     functions.   
essdd*.el  :