Upgrade Georgian transnational highways to trunk

[evgenykatyshev]

@muralito

@evgenykatyshev

Are there any objections?

You should also post your proposal in the communication channels used by the mappers of Georgia.

Both groups in Facebook unavailable. Mailing list have just two message from 2009.
Therefore I send personally invites to forum topics by osm to mappers who draw Georgia.