Updated the base __init__ with the new path set for MDANSE macros directory

MDANSE/__init__.py

@@ -40,8 +40,6 @@ from MDANSE.Core.ClassRegistry import ClassRegistry as REGISTRY
 
 from MDANSE.Data.ElementsDatabase import ELEMENTS
 
-from MDANSE.Core.Preferences import PREFERENCES
-
 import Framework
 
 import os
@@ -49,5 +47,7 @@ import os
 # MMTK imports.
 from MMTK import Database
 
+PLATFORM.create_directory(PLATFORM.macros_directory())
+
 # The default databse is still the MMTK one
 Database.path.append(os.path.join(PLATFORM.package_directory(), 'Data'))