adding start history

Author: malhotra5

README.md

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 ## Acknowledgments
 * 3 Blue 1 Brown: The creator of this engine who uses it for creating cool math videos. Visit his [YouTube channel](https://www.youtube.com/channel/UCYO_jab_esuFRV4b17AJtAw) and [manim repo](https://github.com/3b1b/manim).
 * Todd Zimmerman: Recently made a new [documentation](https://talkingphysics.wordpress.com/tag/manim/) of manim in Python3.7.
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