* Custom no-results message support
* Refactoring and clean up for LanguageCategoryDisplay class
* Document the options for LanguageCategoryDisplay class
* Reduce the spreading of no results handler code
* Add an option to accept no results template
* Remove unwanted, unused constructor too
* Use CSS to hide or show the no-results view
* Remove the unwanted noresults method in jquery.uls.core, directly
call the same method of lcd.
* Add an example
* Support a function returning jquery element as the no-result handler
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