Update README.md

Dung-Han-Lee · web-flow · commit 681865e29801 · 2020-04-16T00:07:06.000-04:00
diff --git a/README.md b/README.md
@@ -39,3 +39,6 @@ function that takes any vector with points (expect to have field x, y and z)
          -- AddOneFace()
       -- CleanUp()
       -- ExtractExteriorPoints()
+
+## License
+  MIT License
