Update README.md

README.md

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 This Github project will let you follow the progress of my design journey, submit issues and design improvement suggestions, request additional modules and/or versions of parts, request added component compatibility, among other things. It is also the place to download all STLs and Source files, as I don't want to have to manage two separate pages and websites with the same files.
 
 https://imgur.com/a/7V5CoWO
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+If you'd like to contribute to the development, feel free to donate.  It's very much appreciated!
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+http://paypal.me/BladeScraper