Merge pull request #23 from WebAssembly/jfbastien-patch-1

Add warning

README.md

diff --git a/README.md b/README.md
index c3ac170..b05cf7d 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,10 @@
 
 # wasm-e2e
 
+**WARNING**
+wasm-e2e isn't kept up to date anymore. We're keeping it here for historical purpose only. Don't rely on it!
+**WARNING**
+
 This repository contains tools and scripts to compile C/C++ to a WebAssembly
 binary format, and run it.