[CHORE] Add CONTRIBUTORS.md

CONTRIBUTORS.md

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+# Contributors
+
+Honeygrove was initially developed as a bachelor project of the [IT-Security and Security Management](https://www.inf.uni-hamburg.de/inst/ab/snp/home.html) working group at Universität Hamburg and subsequently improved.
+
+Contributors that agreed to be named are:
+
+* [Steffen Haas](https://github.com/iBiqQ)
+* [Florian Wilkens](https://github.com/1wilkens)
+* [Arne Büngener](https://github.com/4rne)
+* Alexandra Lindt
+* [Adrian Miska](https://github.com/AdrianMiska)
+* [Frieder Uhlig](https://github.com/Moshtart)
+* [Julian 4goettma](https://github.com/4goettma)