AdrianFretwell signed cla (#171)

contributors/AdrianFretwell.md

@@ -0,0 +1,11 @@
+2019-03-13
+
+I hereby agree to the terms of the Contributors License
+
+I furthermore declare that I am authorized and able to make this
+agreement and sign this declaration.
+
+Signed,
+
+Adrian Fretwell
+https://github.com/AdrianFretwell