ENH: Update dtiprocess version from r207 to r213

ENH: Enable storing of DTI properties as separate scalar point data
BUG: To perform ExperimentalUpload, EXTENSION_SUPERBUILD_BINARY_DIR needs to be defined. It was not defined anymore since we had removed include(Slicer_USE_FILE)
ENH: Updated the Superbuild system to add find_package(Subversion) and find_package(git) as well as remove the inclusion of
BUG: property 'svn:externals' deleted from 'IowaChanges20100105'
BUG: Branch dwiAtlas_Debug_Wendy was removed
ENH: Branch ITKv4 was removed because it couldn't download
'https://www.nitrc.org/svn/brains/BRAINSExecutionModel/trunk
and because it was not used anymore
Merge pull request #581 from fbudin69500/update-DTIProcess-4.3

ENH: Update dtiprocess version from r207 to r213