Merge branch 'add_pdf_evaluator' into 'master'

src/jpp/JTools/JConstantFunction1D.hh

src/jpp/JTools/JConstants.hh

src/jpp/JTools/JDistance.hh

src/jpp/JTools/JElement.hh

src/jpp/JTools/JFunction1D_t.hh

src/jpp/JTools/JFunctional.hh

src/jpp/JTools/JFunctionalMap.hh

src/jpp/JTools/JFunctionalMap_t.hh

src/jpp/JTools/JGarbageCollection.hh

src/jpp/JTools/JGrid.hh

src/jpp/JTools/JGridCollection.hh

src/jpp/JTools/JGridMap.hh

src/jpp/JTools/JHermiteSpline.hh

src/jpp/JTools/JHistogram.hh

src/jpp/JTools/JHistogramMap.hh

src/jpp/JTools/JMap.hh

src/jpp/JTools/JMapCollection.hh

src/jpp/JTools/JMapList.hh

src/jpp/JTools/JMappableCollection.hh

src/jpp/JTools/JMultiFunction.hh