add link to drums RNN bundle file (#396)
add link to drums RNN bundle file (#396)


jesseengel/magenta,YoshikawaMasashi/magenta,YoshikawaMasashi/magenta,YoshikawaMasashi/magenta,YoshikawaMasashi/magenta,adarob/magenta,magenta/magenta,magenta/magenta,jesseengel/magenta,adarob/magenta