SUCCESS !
using Mods as above plus twi.c and twi.sw.c from this link :-
http://e2e.ti.com/support/development_tools/code_composer_studio/f/81/p/529036/1924562#1924562
plus adding :-
Wire.setModule (0) before Wire.begin() in Void Setup() in both Master and Slave :-
I have managed to send two characters from the Master to turn off the Red Led in a loop on the Slave.
BIG Thanks again to B@TTO.
Wouldn't it be perhaps a good idea if these files were updated and placed in the Energia GitHub Repository ? How is this process carried out ?