src/es/eoEsGlobalXover.h and src/es/eoEsLocalXover.h for crossover
src/es/make_XXX_es.h for user-input
test/t-eoEsAll.cpp to test
However, an old bug appeared: className was not const in eoGenOp (and derived classes)
so I had to change that throughtout the hierarchy
Also: introducing eoRndGenerators.h for eoRndGenerator derived classes:
eoNormalGenerator
eoUniformGenerator
eoBooleanGenerator
eoNegExpGenerator
Note the suffix that are added to aid in determining what these classes do