Changeset 10039

#2109:

• Renamed GEEvaluator.cs to GEArtificialAntEvaluator.cs, because a further Evaluator for the Symbolic Regression problem (single objective) is planned to be implemented.
• Excluded the mapping process from GEArtificialAntEvaluator.cs and created several separated mapper classes. Created stubs for breath-first, depth-first, random and PIGE mappers. These mapper implementations should later be easily usable together with different problems. The mapper can be selected in the GUI, via a Problem parameter. The depth-first mapper is already usable, the others still cause exceptions.