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/kitchen001-0.5-0.5]
* [TEXTURE_.MAP_RESCALE-tex_furniture/kitchen002-0.5-0.5]
* [TEXTURE_.MAP_RESCALE-tex_furniture/kitchen003-0.25-0.25]
* Rescaled all kitchen001-003 textures on all map files and prefabs (TODO:repeat this operation in data_source)
* Replaced low-res kitchen001-003 pngs with high-res kitchen001-003 pngs

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

* rescaled kitchen001.png & normalmap to 128x128 pixel

* Added normalmap and another gpl'd texture from p0ss