[confluence] replace subtitle flag icons with new ones

[xhaggi]

As discussed in #3552, this replace the subtitle flag icons with new
32x32 pixel icons from https://www.gosquared.com/resources/flag-icons/

This also fixes some wrong flags like uk. It's Ukrainian not United
Kingdom.

[xhaggi]

@jmarshallnz can we use png instead of gif?

[jmarshallnz]

Whatever is setting the current flag(s) will need updating to use .png I think. @amet?

Did you rebase away the skin.touched alteration I saw on the mail? (Good if so).

[xhaggi]

yes rebased.

[ronie]

skins can now use whatever image extension they like.
see: eee7e97

[jmarshallnz]

The license for these ones looks fine, and they're better quality by the looks, so +1.

[amet]

change that @ronie linked will allow skins to control the name and the extension of the file, services will set ISO 639-1 code and skin can do with it as it pleases.

[afedchin]

Ukrainian flag should be named ua

[xhaggi]

@ronie thanks for the hint .. will update it.

@afedchin like @amet said it's ISO 639-1 which means uk = Ukrainian
http://en.wikipedia.org/wiki/List_of_ISO_639-1_codes

[xhaggi]

@ronie done

[Montellese]

Looks like wikipedia is wrong on http://en.wikipedia.org/wiki/List_of_ISO_639-1_codes. ISO states (see http://www.iso.org/iso/iso-3166-1_decoding_table) that "uk" was requested by the United Kingdoms but has only been reserved so far, not definitely assigned. Ukraine should be "ua".

EDIT: Ah wait ISO 639.1 and ISO 3166.1 aren't the same. So for ISO 639.1 "uk" is correct, for ISO 3166.1 it would be "ua". Obviously we need X different lists of codes for the same countries ;-)

[feruk]

Ukraine is indicated ua
Ukrainian language UK

[ace20022]

EDIT: Ah wait ISO 639.1 and ISO 3166.1 aren't the same. So for ISO 639.1 "uk" is correct, for ISO 3166.1 it would be "ua". Obviously we need X different lists of codes for the same countries ;-)

Right, internally (LangCodeExpander) we use "uk" for 2-letter code, "ukr" for 3-letter code and "ua" for the 2-letter region code. btw. uk for United Kingdoms makes no sense, because it's not a language ;)

[xhaggi]

@ace20022 indeed.. it's a language code not a country code ;)