Improve documentation for how to translate training-related message.
Improve documentation for how to translate training-related message.

This training stuff will probably not be relevant for any other languages anyway, as by the time others start using it seriously, we expect to have the in-dashboard training ready. But just in case.

Resolves #23

WikiEducationFoundation/WikiEduDashboard,WinnySilva/WikiEduDashboard,KarmaHater/WikiEduDashboard,sejalkhatri/WikiEduDashboard,ragesoss/WikiEduDashboard,Wowu/WikiEduDashboard,feelfreelinux/WikiEduDashboard,KarmaHater/WikiEduDashboard,MusikAnimal/WikiEduDashboard,majakomel/WikiEduDashboard,sejalkhatri/WikiEduDashboard,WinnySilva/WikiEduDashboard,MusikAnimal/WikiEduDashboard,Wowu/WikiEduDashboard,adamwight/WikiEduDashboard,sejalkhatri/WikiEduDashboard,alpha721/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,majakomel/WikiEduDashboard,adamwight/WikiEduDashboard,alpha721/WikiEduDashboard,sejalkhatri/WikiEduDashboard,majakomel/WikiEduDashboard,MusikAnimal/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,majakomel/WikiEduDashboard,Wowu/WikiEduDashboard,KarmaHater/WikiEduDashboard,ragesoss/WikiEduDashboard,feelfreelinux/WikiEduDashboard,alpha721/WikiEduDashboard,adamwight/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,MusikAnimal/WikiEduDashboard,ragesoss/WikiEduDashboard,Wowu/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,alpha721/WikiEduDashboard,KarmaHater/WikiEduDashboard,WinnySilva/WikiEduDashboard,sejalkhatri/WikiEduDashboard,feelfreelinux/WikiEduDashboard,feelfreelinux/WikiEduDashboard