eo: added some missing entries

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: ???

eo/test/t-eoSymreg.cpp

@@ -3,7 +3,7 @@
 #endif
 
 #include <gp/eoParseTree.h>
-#include <eoEvalFunc.h>
+#include <eo>
 
 using namespace gp_parse_tree;
 using namespace std;
@@ -203,15 +203,6 @@ void print_best(eoPop<EOT>& pop)
     cout << endl << "RMS Error = " << pop[index].fitness() << endl;
 }
 
-
-#include <eo>
-#include "eoGOpBreeder.h"
-#include "eoSequentialGOpSel.h"
-#include "eoProportionalGOpSel.h"
-#include "eoDetTournamentInserter.h"
-#include "eoSteadyStateEA.h"
-#include "eoScalarFitness.h"
-
 int main()
 {
     typedef eoMinimizingFitness FitnessType;