Clarify in the README the status of tern-react.

README.md

@@ -5,4 +5,9 @@
 
 Tern plugin adding [React](https://facebook.github.io/react/) support.
 
-For the moment it's just a POC to try [acorn-jsx](https://github.com/RReverser/acorn-jsx)
+Pay attention!, this project is just a POC to try [acorn-jsx](https://github.com/RReverser/acorn-jsx).
+There is a lot of limitation:
+
+ * JSX completion cannot work since [acorn-jsx](https://github.com/RReverser/acorn-jsx) cannot support acorn_loose (it is not able to parse not valid JSX). See [issue 32](https://github.com/RReverser/acorn-jsx/issues/32) for more information.
+
+Release was done just for [jsctags](https://github.com/ramitos/jsctags).