README: clerification on DOM API used and shims needed

README.md

@@ -2,7 +2,13 @@
 
 [![Join the chat at https://gitter.im/amber-smalltalk/domite](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/amber-smalltalk/amber-contrib-domite?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
-Lite mite wrapping basic DOM for Amber Smalltalk
+Lite mite wrapping basic DOM for Amber Smalltalk.
+
+It uses a selection of raw DOM API to perform tasks;
+it does not use any cross-browser library.
+To work on IE8 (or other non-compliant browser),
+include `amber-compat-es5` and also shim event API
+(https://github.com/jonathantneal/EventListener looks good).
 
 ## Getting Started