Enhanced Hi-res Terrain Set for Wings Over Europe

This terrain set is based on the Wings Over Europe default terrain tiles. It maintains the layout of the original terrain, and leverages many of the base textures. However, the overall color scheme, graininess, and shading of the original has been improved, along with many tweaks here and there. In addition, the tiles have been converted to 512x512 tiles, which improves some of the jagged edges and allows for some additional detail.