UFO:Alien Invasion Code

* crushed png files

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

* 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