allow custom functions to scale ND results
allow custom functions to scale ND results

also renamed the 'bmpname' parameter to 'category'
in the Database.refineBMPCategory method

phobson/pybmp,phobson/pybmpdb,Geosyntec/pybmpdb,Geosyntec/pybmp,Geosyntec/pybmp,phobson/pybmp