Move MeasureName and LevelName definitions to NewGenerics file.
Revert "Move MeasureName and LevelName definitions to NewGenerics file."

This reverts commit 644691e6c52927d2bad19e9253ad28e737fdd50e.
Move MeasureName and LevelName definitions to NewGenerics file.
New persistence methods for write.csv and write.excel
Recreate StochasticsMeasure file
Test persistence methods