Added nifti file validation.
Added nifti file validation.
NeuroVault/NeuroVault,chrisfilo/NeuroVault,chrisfilo/NeuroVault,NeuroVault/NeuroVault,erramuzpe/NeuroVault,erramuzpe/NeuroVault,burnash/NeuroVault,erramuzpe/NeuroVault,burnash/NeuroVault,NeuroVault/NeuroVault,chrisfilo/NeuroVault,burnash/NeuroVault,burnash/NeuroVault,chrisfilo/NeuroVault,burnash/NeuroVault,NeuroVault/NeuroVault,chrisfilo/NeuroVault,erramuzpe/NeuroVault,NeuroVault/NeuroVault,erramuzpe/NeuroVault