document changes merged into train-2011.09.22

ChangeLog

@@ -5,6 +5,9 @@ train-2011.09.22:
   * development harness (./run.js) now respects an IP_ADDRESS env var to bind to a specific address (other than 127.0.0.1)
   * improved first-time development experience:  `git clone && cd browserid && npm install && npm run`
   * initial support for running locally under virtualbox via vagrant: issue #261 (thanks ozten!)
+  * (fix 2011.09.23) fix race condition between relay iframe and window introduced with IE9 support.  issue #287
+  * (fix 2011.09.23) fix blank popup on second sigin invocation in same session in FFX:  issue #286
+  * (fix 2011.09.23) explicitly disable caching for /wsapi calls, prevents unwanted caching of CSRF and friends. issue #294
 
 train-2011.09.01:
   * /ws_api/set_key always returns returns value instead of HTTP 204 response: #219