UFO:Alien Invasion Code

* base/textures png crush.

* Reduced filesizes of the tex_shop texture folder by compressing/optimizing the files with pngout

* Replaced all existing fruit textures & normalmaps with quadrupled texture resolution versions (fruit001-fruit005)
* git-renamed fruits006_new_lq-fruits010_new_lq + normalmaps to fruits006-fruits010
* Replaced all fruit textures on all maps with new versions
* Added more variety by also using fruits006-fruits010 on all maps
* git-deleted unnecessary textures fruits001_lq-fruits005_lq & their normalmaps
* Minor other fixes on maps
* Updated LICENSES

* Added fruits006 - fruits010 pngs to enable more variety for our shops, added normalmaps for all of those textures, @todo: integrate those on the various maps