add README

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/trunk@1324 b32b6428-25c9-4566-ad07-03861ab6144f

apps/xAALBrowser/README.md

+# Readme file
+
+/!\No more supported/!\
+
+## XAALBrowser 
+It is an xAAL component
+
+## xAALBrowserIHM 
+* It is a web application working on cherrypy server
+* The Server-Sent Events technology has been used to xAAL events from
+the server to the web app: see web browser supported (problem Android???)
+
+## Long polling
+
+### References
+* http://dsheiko.com/weblog/websockets-vs-sse-vs-long-polling/