I used lots of images that I imported into blender just to look at while I worked (blueprints, etc.) They can easily be removed but it will take some time. Maybe next time I open up the file.
The stuff in SVN (Model, textures, etc) are all GPL -- the reference stuff was not included. The project files that may not be GPL are all on my machine.
The .blend doesn't really need to be in our art repository if you don't want to put it there.. it's just handy for someone who comes along later to do tuning or whatever.