Add a local CONTRIBUTING.md file that points to the main one on istio/community. (istio#1871)

geeknoid · web-flow · commit be0e20d2f552 · 2017-11-27T12:58:34.000-08:00
Having this file present helps our community-friendly rating that GitHub maintains.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
@@ -0,0 +1,5 @@
+# Contribution guidelines
+
+So you want to hack on Istio? Yay! Please refer to Istio's overall
+[contribution guidelines](https://github.com/istio/community/blob/master/CONTRIBUTING.md)
+to find out how you can help.
