add p-map and p-matrix

[Jay4869]

improve basic-modeling.py to generate images p-value-map and p-value-matrix Also, updating read_image.py

[amandazhang]

@Jay4869 Jay, can you add contour to the p-maps to make brain area more clear?

[Jay4869]

So far, I don't how to do it such as mark the sub-area in red. I need to ask someone is familiar with python ploting

[amandazhang]

@Jay4869 I think we can first mark the skull line(meaning the outside).And also compared to p-map we've seen in the reference paper, do you also think the marked area should be smoother?

[Jay4869]

So far, I only make the sub-area be black, but If we can mark in color 'red', the problem should be solved. Do you want to take care of this part?

[amandazhang]

Okay, I'll take care of this part. More details tmr.

[Jay4869]

I would like to merge this branch to the master at this point, and Qingyuan will improve our p-value map beyond my basic-modeling.py