Updated load_snapshot to work with topo.sim.model correctly
Updated load_snapshot to work with topo.sim.model correctly

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