Updating the maxima separation value

[neurolabusc]

I realize the author of this useful tool has left for industry. However, as a note for users, if you adjust the maxima separation value, you will need to re-upload the the overlay map in bspmview in order for the new distance parameters to take effect. If you change the value but fail to re-upload the image, the generated tables will claim to use the new separation, but in fact present the data unchanged from when it was loaded.