* Added "shaded relief" overlay effect (down to level 10 worldwide, level 12 for USA)
* Using "Avenir Next" font family for all labels (clearer labels)
* Reduced contrast of road label halo (thus all labels has "smart halo" effect)
* Added style for country labels
* Removed smart halo blur for standard resolution render
* Many minor design adjustments
* Switched to jpg format for smaller tile size