Log Message:
py-path.py: updated to 11.1.0

11.1.0
- Add iglob method.
- Rename tempdir to TempDir and declare
  it as part of __all__. Retain tempdir for compatibility
  for now.
- TempDir.__enter__ no longer returns the TempDir
  instance, but instead returns a Path instance, suitable for
  entering to change the current working directory.