update changelog with recent merged changes for train-2012.05.25

ChangeLog

@@ -8,6 +8,8 @@ train-2012.05.25 (in progress):
   * when user types in wrong password while verifying secondary address (on different browser), show clear tooltip style error: #1557
   * don't make a user type their password when not neccesary (adding secondary address to acct with only primary addresses): #1555
   * perform rigorous checking of inputs to dialog from RP. (PR #1627, bug #747859)
+  * support new parameter names in .get & .request APIs: #1643
+  * perform rigorous checking of arguments returned from primary IdPs: bug #758449
 
 train-2012.05.14:
   * Password is now requested in dialog for new user signup: #1000, #290