Added legacy support for JointScaling to allow pickles to load
Added legacy support for JointScaling to allow pickles to load

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