ENH: Stamp NRRD files with DWIConvert/BRAINSTools info in comments
Merge pull request #2 from Chaircrusher/DWIConvert_Add_Comment_Lines

ENH: Stamp NRRD files with DWIConvert/BRAINSTools info in comments
ENH: Use const correct version of itkGetModifiableObjectMacro

ITKv4 now allows more precise use of Get functions with better
const correctness.
ENH: Update External packages for ANTs and ITK

The ITK version that supports const-correctness.
NIPYPE is updated to latest version.
ANTS to match ITK
SimpleITK recent improvements.
COMP: DWIConvert syntax error.

The DWIConvert had a syntax error in printing the header
information.