ENH: Update DTIAtlasFiberAnalyzer from r128 to r130

BUG: On Windows, the extension of the executable has to be set for the tests to pass. the variable 'extension' was used instead of 'fileextension'
http://www.nitrc.org/plugins/scmsvn/viewcvs.php?view=rev&root=dti_tract_stat&revision=130

BUG: Updated version of DTIProcess that is compiled as part of DTIAtlasFiberAnalyzer and addition of CMake variables to the DTIProcess ExternalProject so that it can build as an extension
http://www.nitrc.org/plugins/scmsvn/viewcvs.php?view=rev&root=dti_tract_stat&revision=129