python: enable tk support

That addresses the following issues:
- Add tkinter ("Tk interface") support. Tkinter is the standard Python
  binding to the Tk GUI toolkit.
- Fix broken IDLE (the Python IDE) built with Tkinter.

Add two new subpkgs: python-tkinter and idle-python.
python3.4: enable tk support

That addresses the following issues:
- Add tkinter ("Tk interface") support. Tkinter is the standard Python
  binding to the Tk GUI toolkit.
- Fix broken IDLE (the Python IDE) built with Tkinter.

Add two new subpkgs: python3.4-tkinter and idle-python3.4.

Remove --enable-unicode and --with-wctype-functions configure options.
Both have been removed from Python 3.x.