Add Contributions section to README to point at the CLA.
diff --git a/README b/README
index e9fffab..4d2a7be 100644
--- a/README
+++ b/README
@@ -24,6 +24,14 @@
https://github.com/golang/lint/issues
+Contributions
+-------------
+Contributions to this project are welcome, though please send mail before
+starting work on anything major. Contributors retain their copyright, so we
+need you to fill out a short form before we can accept your contribution:
+ https://developers.google.com/open-source/cla/individual
+
+
Vim
---
Add this to your ~/.vimrc:
