Remove text from the qrcode page and use gettext for localization

[peppelinux]

the qrcode page has too many italian texts as constants in the html/js

we must move those texts in a .po file and load it during the rendering though the satosa backend, deciding which .po (compiled gettext) to choose according to the user-agent language available in the satosa context

[Zicchio]

After some internal discussion with out team at tndigit, we came to the conclusion that either an english or multilingual page is a high priority for part of the team that review our work and/or some of our partners.
Is it possible to bump this in priority, maybe at milestone 0.9.0 or 0.9.1 based on the progress of the tasks currently at hand?

Tagging @peppelinux for notification. If preferred, we can move the discussion to a different channel.

[peppelinux]

js component candidate for the implementation: https://github.com/guillaumepotier/gettext.js/