Pythons path functions - os.walk(). os.path.exists(). etc support bytes for paths as well as strings, support this with blender/rna too.

- bpy.data.*.load() functions were only accepting UTF-8 paths.
- rna functions/properties now accept byte values rather then strings for file paths.
- bpy.path.resolve_ncase now supports byte objects.

release/scripts/modules/bpy/path.py

@@ -129,7 +129,7 @@ def resolve_ncase(path):
     import os
 
     def _ncase_path_found(path):
-        if path == "" or os.path.exists(path):
+        if not path or os.path.exists(path):
             return path, True
 
         filename = os.path.basename(path)  # filename may be a directory or a file