[docs] Missing items in installation/setup instructions (issue 12436)

[ezio.melotti at gmail.com]

http://bugs.python.org/review/12436/diff/5769/Doc/using/windows.rst
File Doc/using/windows.rst (right):

http://bugs.python.org/review/12436/diff/5769/Doc/using/windows.rst#newcode587
Doc/using/windows.rst:587: Notepad++ is a free source code editor and
Notepad replacement that support several languagees including Python.
Running in the MS Windows environment, its use is governed by GPL
license.
Also this line is too long.

http://bugs.python.org/review/12436/