in eoPop (I had been postponing that for a long time!) which in turn required
another class of random generator (whose operator() takes an unsigned as argument)
Pop: error in nth_element_fitness
sga: error in eval
eoParseTree: oddities with gcc
checkpointing: added eoParser and eoState
eoParser: support for wrongly entered parameter names
rnd_generators: flip(0.5) -> flip(bias) in binary_generator
selectors.h: ???