support r94_250bps_nn model type
support r94_250bps_nn model type

jts/nanopolish,jts/nanopolish,mateidavid/nanopolish,jts/nanopolish,jts/nanopolish,mateidavid/nanopolish,jts/nanopolish,mateidavid/nanopolish,mateidavid/nanopolish,mateidavid/nanopolish