The texture array used by WS30 requires that all
component textures be the same size and format.
This commit adds an alpha channel to those
png file used as primary textures in materials.xml
files which did not have one.
the fixes missing from FGDATA are:
- fixing the Portuguese and Spanish islands in the Atlantic (Madeira, etc.) which had been erroneously assigned to Africa given their proximity. Now they belong to European Mediterranean region, which makes them look better
- improvements to autumn textures in Europe
- huge improvement of the airport grasses all over the world, including hi-res overlays
- matching runway shoulders for the whole globe
- Asian capitals added to list of large cities so they get more density of road lights
- Emirates region
and possibly more.
