Add match_language function in utils to match any user given
language code with a list of engine's supported languages.

Also add language_aliases dict on each engine to translate
standard language codes into the custom codes used by the engine.

that support them.
users can still query lesser supported through the :lang_code bang.

and refactor method to make it testable without making requests

utils/fetch_languages.py gets languages supported by each engine and
generates engines_languages.json with each engine's supported language.

TODO:
    merge attributes

creates simple multilingual infobox using wikipedia's api

* writing general mediawiki-engine
* using this engine for wikipedia
* using this engine for uncyclopedia

* add paging support
* make number_of_results changable
* make result calculation more clear
* add comments