Added set_matrix_dimensions call to __init__ of PatternGenerator.
Added set_matrix_dimensions call to __init__ of PatternGenerator.

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