Search google images instead of last.fm for cover art

[popeen]

From popeen/Booksonic-App#55

I have been fixing my collection and have been having to manually paste the URL from google images as it appears the default cover search uses last.fm. It would be more beneficial (IMO) to search google based on author and title and display some choices.

I am happy to do the work to implement this but would need a quick start start on how you build the war file for testing. I assume you need jdk 1.6 as some api are deprecated in > 1.7 and only build the subsonic-main dir?