[docs] [issue15041] tkinter documentation: update "see also" list

[Michael Driscoll]

Michael Driscoll <mike at pythonlibrary.org> added the comment:

I thought the ebook, "Modern Tkinter for Busy Python Developers" by Mark Roseman was pretty good too: http://www.amazon.com/Modern-Tkinter-Python-Developers-ebook/dp/B0071QDNLO/ref=sr_1_1?ie=UTF8&qid=1339446684&sr=8-1

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nosy: +michael.driscoll

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