Update README.md

Author: hemangsk

README.md

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 # python-on
+Welcome to the Numerical Methods Chapters Downloader.
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+Thanks to youtube's @numericalmethodsguy for making awesome video lectures and providing PDF of the notes on the website nm.mathforcollege.com.
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+This python script downloads all the chapters from the website, saving me somewhere around 2 mins 33s lol.
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+Requirements
+1.  BeautifulSoup
+2.  Wget
+  
+Help me make it better.
+
+Coming Soon with a better documentation.
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