FIX: replace freesurfer subjects directory

Author: eilidhmacnicol

Dockerfile

@@ -28,7 +28,6 @@ RUN curl -sSL https://surfer.nmr.mgh.harvard.edu/pub/dist/freesurfer/6.0.1/frees
     --exclude='freesurfer/lib/qt' \
     --exclude='freesurfer/matlab' \
     --exclude='freesurfer/mni' \
-    --exclude='freesurfer/subjects' \
     --exclude='freesurfer/trctrain'
 
 ENV FSL_DIR="/opt/fsl-5.0.11" \