UFO:Alien Invasion Code

* base/textures png crush.

* Recompressed all textures in base/textures/tex_furniture with Trimage image compressor and commited those files, where a filesize reduction of at least 5% (up to 72.7%) was achieved

* Converted some of the recently upgraded textures to 8bit indexed colors to reduce filesizes and improve loading performance (chest005, kitchen001-003, wash_a)

* [TEXTURE_.MAP_RESCALE-tex_furniture/chest005-0.25-0.25]
* [TEXTURE_.MAP_RESCALE-tex_furniture/chest006-0.25-0.25]
* [TEXTURE_.MAP_RESCALE-tex_furniture/chest006_2-0.375-0.25]
* Rescaled all chest005-chest006_2 textures on all map files and prefabs (TODO:repeat this operation in data_source)
* Replaced low-res chest005-006_2 pngs with high-res versions
* Also reduced attenuation of the steam sound and fixed container related texture issues on city_industry map

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

* New GPL'd textures by p0ss