Add __future__ statements

Author: khalim19

pypredef_generator.py

@@ -3,6 +3,8 @@
 introspection of module objects.
 """
 
+from __future__ import absolute_import, print_function, division, unicode_literals
+
 import inspect
 import os
 

pypredef_generator_pdb.py

@@ -3,6 +3,8 @@
 procedural database (PDB).
 """
 
+from __future__ import absolute_import, print_function, division, unicode_literals
+
 import inspect
 
 import ast

pypredef_generator_plugin.py

@@ -3,7 +3,7 @@
 (Eclipse IDE plug-in) for GIMP modules.
 """
 
-from __future__ import absolute_import, print_function, division
+from __future__ import absolute_import, print_function, division, unicode_literals
 
 import os