It is no longer derived from eoPop, it now gets a destination population.
This saves a lot of copying. The semantics has changed a little as well. It is
now an _infinite_ iterator. operator++ will *not* dispense new individuals, but
will merely stay at the end. To get a new indy, use operator*() as before.
eoEasyEA now checks the checkpoint *after* making a generation and clears the offspring
eoGeneralBreeder is changed to reflect the changes in eoPopulator
eoSequentialSelect now uses setup() rather than init()
eoBestSelect always return the best individual
eoSequentialSelect a selectOne version of eoDetSelect (uses an index to
return next offspring from sorted pop)
This impacts on many files, creating new entries in src (the old ones are moved
to obsolete dir), modifying t-eoSymreg.cpp and t-eobin.cpp in test,
as well as gprop.cc and mastermind.cc in app dir (not to mention almost all
files in tutorial:-(
