Calendar title configuration for Asian languages

In Japanese, Chinese and Korean (and possibly other languages), the calendar title should look a bit different from the default.

* English: August 2013
* Japanese: 2013年 8月

For these languages, it should be possible to add a suffix to the year, and to switch the order of year and month.

I have blatantly copied the relevant option names from [jQuery UI datepicker](http://api.jqueryui.com/datepicker/):

* `yearSuffix`
* `showMonthAfterYear`

You could argue that they should be added to the `i18n` configuration hash, but I haven't, mainly for one reason: You will rarely overwrite the default value, but if you configure any i18n value you need to pass a configuration value for all the keys or suffer from `undefined` variables.