HedgeEdit - Extracting Resources

[Radfordhound]

HedgeEdit should auto-detect if it's your first time opening a stage from a certain game and ask you if you wish to extract its resources (atm object models/materials/textures). There should also be an option to do so manually at any time in one of the menus.

I need to make it so it saves for each game whether or not you've extracted its resources yet to a config file. But furthermore, I need to have some sort of version number for it in-case the resources HedgeEdit can extract change in the future (for example, later on when I add shader support you'll need to extract those too to get them to work).