* new textures for EarthView ( https://forum.flightgear.org/viewtopic.php?f=5&t=29780&p=289106#p289106 )
* change location of earthview textures to Models/Astro/Textures/*
* change pale_blue_aug_??.png world tiles to Textures/world_??.png
* change clouds_??.png to Textures/clouds_??.png
* change corresponding xml accordingly