fix imports and spelling errors
refactoring for symbolic regression
refactored, but this may be reversed
Added "Evaluation" folder to provide methods for evaling FunctionNodes
Moved Evaluation->Performance; created Evaluation to eval hypotheses;
multiple small fixes
Moved Evaluation->Performance; created Evaluation to eval hypotheses;multiple small fixes
removed some pyc files
Merge branch 'master' of https://github.com/piantado/LOTlib