Changed Lyons to work in the frequency domain again. Reduced mem requirements by using float32's.
Changed Lyons to work in the frequency domain again. Reduced mem requirements by using float32's.

mjabri/topographica,ioam/topographica,mjabri/topographica,mjabri/topographica,ioam/topographica,Tasignotas/topographica_mirror,ioam/topographica,ioam/topographica,mjabri/topographica,Tasignotas/topographica_mirror,ioam/topographica,Tasignotas/topographica_mirror,Tasignotas/topographica_mirror,mjabri/topographica,Tasignotas/topographica_mirror