Update README.md

Author: J0m1ty

README.md

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 # RecycleScript
-A userscript for the AoPS community
+RecycleScript is a userscript for the AoPS community that adds "repost" functionality (quoting without quotes).
+This userscript is not created by, endorsed by, or otherwise affiliated with Art of Problem Solving Incorporated.
+
+## Installation
+1. Install [Tampermonkey](https://www.tampermonkey.net)
+2. [Click here](recyclescript.user.js?raw=1)