Allow to filter countries by locale in the dialog

[themobilecoder]

This commit is for letting the user search / filter a country in the dialog using the selected locale.

Fixes #62 and
Fixes #48

I added a flag in the constructor so that a user can still search using the original name in the country_codes json file.

[AhsanAyaz]

Thanks for the PR @themobilecoder .
@imtoori can you please merge this and release a new version. This is quite crucial for many apps who're using internationalization 🙂
Thanks.

[imtoori]

Thank you very much
I'll review it asap today

[themobilecoder]

There could be a better solution than this commit as this is just a quick fix. This implementation always localise the whole of country_codes every time the dialog is shown.

[imtoori]

I think filterByLocale is a bit "useless" in the sense that naturally the filter should be performed using locale. Don't you think so?

[imtoori]

#70
I think this is better, what do you think @themobilecoder ?

[AhsanAyaz]

@imtoori your PR looks good.

[themobilecoder]

#70
I think this is better, what do you think @themobilecoder ?

I agree! Updating the search is better. Thanks @imtoori!