[enhancement] Download Images

[cmitchell83]

Add the images to the extras download, would be nice if you could change the image name from the current name to the name of the game as well
The parsing is already being done 'bg_url' and 'image_url'.
It would be nice if you could add a separate key for images that would download them all to one folder
example...
gogrepo.py dlimages %cd%\images

[eddie3]

Will consider this for future version for sure.