Fixed problem of saving Nibabel image to BytesIO object.
Fixed problem of saving Nibabel image to BytesIO object.

NeuroVault/NeuroVault,NeuroVault/NeuroVault,chrisfilo/NeuroVault,NeuroVault/NeuroVault,chrisfilo/NeuroVault,chrisfilo/NeuroVault,NeuroVault/NeuroVault,chrisfilo/NeuroVault,NeuroVault/NeuroVault,chrisfilo/NeuroVault