Issue with the MaP location output

[an12345an]

Following an update to the current master, the following lines in bisl.py needed to be changed from having 'spatial_pdf.flatten' to having 'pdf.flatten' otherwise the MaP location outputted was incorrect.

380c380
< MaP_index = np.argmax(spatial_pdf.flatten())

    MaP_index = np.argmax(pdf.flatten())

392c392
< 'MaP_val' : spatial_pdf.flatten()[MaP_index],

                'MaP_val' : pdf.flatten()[MaP_index],