Update README.md

Author: InfamousPlatypus

README.md

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-# Gridsynth-Python-wrapper
+# Gridsynth-Python-wrapper
+This is a wrapper for [Gridsynth](https://www.mathstat.dal.ca/~selinger/newsynth/#license)
+Please read our [Contributing guidelines](https://github.com/InfamousPlatypus/Gridsynth-Python-wrapper/blob/main/CONTRIBUTING.md). Contributing means you agree with our [Code of Conduct](https://github.com/InfamousPlatypus/Gridsynth-Python-wrapper/blob/main/CODE_OF_CONDUCT.md)