COMP: Temporary patch to get SimpleITK to build

SimpleITK is catching up the single precision version
of ITK that is available.
COMP: Need git tag from github for temporary fix.

SimpleITK needs a bug fix for working with the newest version of ITK.

Template forward parameters can not occur with typedefs.
COMP: DCMTK needs the NO_MODULE option added for the find function.
COMP: UKF did not build properly due to SEM

UKF did not specify the proper build paths for building SEM.
COMP: Updated ANTS to use tarball of BOOST as well.
COMP: Fix antsUtilities library linkage

When building BRAINSTools within DTIPrep antsUtilities
libraries were placed in the DTIPrep-build/lib directory
rather than the BRAINSTools-build/lib directory, so link
against the proper directory.
BUG: Regression from Dicom2Nrrd introduced

A DWI data set that was not represented in the DWI testing suite identified
a regression in the DWIConvert program introduced during refactoring.

This may be an issue with behavioral changes in DCMTK between stand-alone builds
and slicer builds, but that has not been confirmed.
ENH: Add feature to make SEMTools easier.
COMP: Min required Python is 2.6

Interpreter and libraries only need to be 2.6, BUT they must
match exactly.
ENH: Update all DTIPrep compatible SEM tools.