More downstream contributions back

For consideration:

* PySurfer : 13 (Alex Gramfort contributed FreeSurfer IO initially used there IIRC)
* MichielCottaar/cifti : 60 (nipy/nibabel#641 deprecated that tool altogether)

Author: effigies

todo.md

@@ -154,8 +154,10 @@ Downstream contributions back (number of commits, ):
     FSL : 108
     PyMVPA : 87
     Nipype : 65
+    MichielCottaar/cifti : 60
     dcmstack : 22
     MNE : 15
+    PySurfer : 13
 
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