* base/textures png crush.
* Recompressed all textures in base/textures/tex_base with Trimage image compressor and commited those files, where a filesize reduction of at least 5% (up to 81.5%) was achieved
* Reduced filesize of the tex_base textures folder by compressing/optimizing the .png files with pngout
* Converted some textures to indexed colors (8bit=256 colors) to optimize filesizes and improve loading performance
* Replaced tex_base/vent002-007 jpg textures with high resolution and high quality png versions, updated LICENSES