ADHD200 - Viz - Pysurfer

Updated pysurfer viz for adhd200. Also streamlined the code.

Signed-off-by: Zarrar Shehzad <czarrar@gmail.com>
Merge branch 'master' of https://github.com/czarrar/cwas-paper

Signed-off-by: Zarrar Shehzad <czarrar@gmail.com>

Conflicts:
	adhd200/05_viz/20_pysurfer_lh.py
	adhd200/05_viz/20_pysurfer_rh.py