FIX Brain.add_label(): make sure to have a unique label_name for storage in the Brain.labels dictionary
FIX Brain.add_label(): make sure to have a unique label_name for storage in the Brain.labels dictionary

haribharadwaj/PySurfer,mwaskom/PySurfer,bpinsard/PySurfer,nipy/PySurfer,Eric89GXL/PySurfer,effigies/PySurfer,diego0020/PySurfer