COMP: set percision to 17 digits for writing out NRRD header.
DEV: Add DataSink for STAPLE
Add the spherical coordinate generation to the BRAINSCut

A new module is added to the BRAINSCut that helps to design independent
tests for the spherical coordinate generation part of the BRAINSCut.
ENH: Adding template building
ENH: Added longitudinal Freesurfer processing
Merge pull request #167 from dmwelch/FSNipype

ENH: Added longitudinal Freesurfer processing
Merge pull request #168 from aghayoor/SphericalGenerationModuleForBRAINSCut

Add the spherical coordinate generation to the BRAINSCut
Merge pull request #166 from reginakim/DataSink_STAPLE

DEV: Add DataSink for STAPLE
COMP: use 17 digits of precision writing out doubles as text
Merge pull request #169 from Chaircrusher/DWIConvert_NRRD_Precision_Fix

Dwi convert nrrd precision fix