Move translation strings to a single configuration file

[niconoe]

Would be easier for translators.

[mrtnrey]

Can you please also translate the radar providers in the footer? Related to remark #103 (comment)
( - NO translation needed for Skeyes, Deutscher Wetterdienst and Météo-France )
( - if an official translation is not available, one should use the "local" language of the institution)
It is important to show the correct names on an official website.
The links can be language-ignorant.

ENG:
Royal Meteorological Institute of Belgium (RMI) (Jabbeke & Wideumont)
Flemish Environment Agency (VMM) (Helchteren)
Royal Netherlands Meteorological Institute (KNMI) (Herwijnen & Den Helder)

NL:
Koninklijk Meteorologisch Instituut van België (KMI) (Jabbeke & Wideumont)
Vlaamse Milieumaatschappij (VMM) (Helchteren)
Koninklijk Nederlands Meteorologisch Instituut (KNMI) (Herwijnen & Den Helder)

FR:
Institut Royal Météorologique de Belgique (IRM) (Jabbeke & Wideumont)
Vlaamse Milieumaatschappij (VMM) (Helchteren)
Koninklijk Nederlands Meteorologisch Instituut (KNMI) (Herwijnen & Den Helder)

[niconoe]

Will do!

[niconoe]

That's now solved.

[mrtnrey]

@peterdesmet do we have to change the FR label for INBO to "Institut de Recherche sur la Nature et les Forêts" ? (Footer/left column).

[peterdesmet]

You're right, now done in 6254685