Another change which worth mention on ML is AdapterTokenStore introduced
* There is new option "token-store" in adapter-configuration with
possible values "session" and "cookie" .
* Default value is "session", which means that info about authenticated
user are saved in Adapter in HttpSession (same behaviour like it was before)
* Alternative "cookie" means that all token info is stored in cookie,
which means that HttpSession is not created at all for particular
application. It's alternative useful for stateless applications, which
doesn't need HttpSession.
I've added AdapterTokenStore as an abstraction to handle
saving/loading/removing this account info.
Everything is again backwards compatible (existing apps are still saving
info in Http Session and are not affected at all, as default value is
"session", which is used if nothing is specified in config)