[docs] Amazon.com links (issue 23579)

[ethan at stoneleaf.us]

http://bugs.python.org/review/23579/diff/14109/Doc/library/othergui.rst
File Doc/library/othergui.rst (right):

http://bugs.python.org/review/23579/diff/14109/Doc/library/othergui.rst#newcode53
Doc/library/othergui.rst:53: <http://www.manning.com/rappin/>`_, by Noel
Rappin and
I think the goal is not to replace one online book store with another. 
Perhaps something along the lines of:

The `wxPython website <hhtp://http://www.wxpython.org/`_ has links to
availabe books.

http://bugs.python.org/review/23579/diff/14109/Doc/library/tkinter.rst
File Doc/library/tkinter.rst (right):

http://bugs.python.org/review/23579/diff/14109/Doc/library/tkinter.rst#newcode40
Doc/library/tkinter.rst:40: `Python and Tkinter Programming
<http://www.manning.com/grayson/>`_
Either list both Manning and Amazon, or neither.  Or an actual home page
for the book not from either online bookstore.

http://bugs.python.org/review/23579/