Include species with D=0 in "Post Processing Stats Data"

[ACowan0105]

species with D=0 are subject to variable reduction in PDEs and then not recognized as variables for post processing stats.

[jcschaff]

This would be fairly involved to implement on the solver side (post processing done in C++) but maybe not too bad if done in the data retrieval logic in Java (don't know).

start with DataSetControllerImpl::getDataSetTimeSeries() and dig deeper from there ... fun, fun, fun.