[Imports] NavAds fuel stations import, take 3

[Ilya Zverev]

Hi folks,

Thanks for you comments on the last iteration. I have also seen local 
discussions in french and german communities, with strong voices towards 
rejecting the import in their countries. So I ask you to consider the 
next iteration.

I have split the import in five parts, you can see them on the 
validation website: http://audit.osmz.ru/

Following the issue of wrong opening_hours, now the value of this tag 
won't overwrite the value already present in OSM.

Also, validation is now enabled, and when a marker is green, you can 
adjust a node position to better match the imagery.

Please take another look at the import.

Thanks,
Ilya