ENH: Prepping for CMB 6.0 Development

Changes made after this commit is for supporting CMB 6.x

CMakeLists.txt

@@ -10,7 +10,7 @@ macro (superbuild_setup_variables)
   if (cmb_SOURCE_SELECTION STREQUAL "git")
     # Assuming master; just use the latest version, but let the user set their
     # own version in case it is actually a branch from some other version.
-    set(CMB_VERSION_DEFAULT "5.0.0-develop"
+    set(CMB_VERSION_DEFAULT "6.0.0-develop"
       CACHE STRING "The default version of CMB to use if it cannot be detected")
     mark_as_advanced(CMB_VERSION_DEFAULT)
     set(cmb_default_version "${CMB_VERSION_DEFAULT}")