Edited README

README.md

 # NCML Transform Utility Demo
 
 This file contains the code that is used in this NetCDF ISO XML generator. Although implemented for the command
-line the core class that performs the transformation can be adapted to any interface.
+line the core class that performs the transformation can be adapted to any interface. This wraps the **ncgen**, **ncdump**,
+and **xsltproc** utilities, so be sure that these are installed on your system before using!
 
 ## Useage