UFO:Alien Invasion Code

* crushed png files

* Recompressed all textures in base/textures/tex_lights with Trimage image compressor and commited those files, where a filesize reduction of at least 5% (up to 68.7%) was achieved

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

* Glow maps, normal maps and specular maps for light textures

* GPLed a car texture

* WIP alien base and a new set of general use lights

* Normalmaps for some of my textures that were missing them.

* Some new textures for an electrical box

* Some new/updated textures

* New advert textures for city RMA