Django-messages-ui

------------------

* JS stop transient-message fade on close-link click.

------------------

* JS don't parse non-json.

------------------

* Don't touch non-200 responses.

------------------

* JS cleanup; added JSLint options.

------------------

* Added ``closeLink: false`` plugin option.
* Subsequent plugin calls on the same element default to previous options
unless explicitly overridden.

------------------

* Added ``AjaxMessagesMiddleware`` and ``handleAjax`` plugin option.