Improve values' name in the GUI

[MaanooAk]

Now the names are of the style 'dist_name', but they should be shown more like 'Dist name' or even 'Distribution name'.

Transfomations:

• use lang/translation files (suggested by Sima214)
• or apply some transformation to the keys before showing them
  • replace underscores with spaces
  • make the first char uppercase (?)
• or extend the protocol to support also a label field

[Sima214]

I designed the protocol around the idea of using lang/translation files.
But please slow down!!!
We barely have a working gui.