[Tagging] 'name' variation tags standardisation

[yarl at o2.pl]

Now there is a good trend to use colon in key names. Maybe we should
move these tags below?

int_name -> name:international
nat_name -> name:national
reg_name -> name:regional
loc_name -> name:local
old_name -> name:old
alt_name -> name:alt or name:alternative
official_name -> name:official

But then we can have structures like that: name:official:de/ru/etc.

What do you think about it?

--
Paweł Marynowski
User:Yarl