Use flags-css-icon submodule

[herrvigg]

Issue by pedro-mendonca
Friday Mar 06, 2015 at 16:56 GMT
Originally opened as qTranslate-Team/qtranslate-x#71

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For comparing purposes, I'm making this pull request.
Please consider this a full working suggestion only, feel free to comment or deleting it :)
You must know that this is made on top of your last commit at this time, and should be all checked.
Also consider the todo list and considerations list in qTranslate-Team/qtranslate-x#52

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pedro-mendonca included the following code: https://github.com/qTranslate-Team/qtranslate-x/pull/71/commits