Sample Python code not included in "Random generator and text with OpenCV" tutorial

[dmallia17]

The Random generator and text with OpenCV tutorial only contains C++ code but the program has already been translated to Python and is contained in the OpenCV samples here. (Unfortunately I only noticed this about halfway through creating a translated version of my own!) On a related note, the tutorial also uses in-document code, instead of using references to the actual sample C++ file, and the link to the C++ sample is broken. If so desired, I would be happy to submit a pull-request for:

• fixing the broken link to the C++ sample file
• revising the tutorial to use references to the C++ sample file
• relocating the Python sample file to the Python tutorial code directory
• referring to the Python sample file in the tutorial (with toggles for switching between the languages)