Amazon Store: Support adding items to the cart using amarok:// URLs

Now you can click on a URL like

amarok://service-amazonstore?asin=B004UQSB8I&command=addToCart&name=The%20Cure%20-%20Disintegration%20(Remastered)&price=989

and one of the best albums ever recorded is being put into your shopping
cart. This is going to be used in the info applet, hopefully soonish.

Btw, searching has also been available for some time now:
amarok://navigate/MP3%20Music%20Store/?filter=something_to_search_for

So script writers have something to play with. :-)