ENH: Upgrade version of TubeTK

This new version of TubeTK features
* Directory structure and build process mirrors ITKModuleTemplate
* Builds without special requirements beyond -DModule_TubeTK=On
* Does not rely on LibSVM or RandomForest - those options are now
   eliminated because they did not add functionality
* Improved example scripts
* Only builds one library (TubeTK) - eliminating other TubeTKLibs
   enables  packaging, installation, and usage outide of ITK

Modules/Remote/TubeTK.remote.cmake

@@ -49,5 +49,5 @@ itk_fetch_module(TubeTK
 "
   MODULE_COMPLIANCE_LEVEL 3
   GIT_REPOSITORY ${git_protocol}://github.com/InsightSoftwareConsortium/ITKTubeTK.git
-  GIT_TAG 707fa9f67d073739a14cd9b3d05b680271022240
+  GIT_TAG "a570e993fca02ffa0019c9f23f99239c8b3cae97"
   )