Add a texture dump feature

No logs/callstack/whatever, that's a request for a feature. I imagine it as a hotkey toggle, whenever it's on the texture draw function saves every texture/normal map/specular map/etc to a specified folder. Why? Because X360 is relatively old and had pretty decent specs for its time, so game devs have been making their games look better on it. It's very easy to do, so why not? :3