ocarina: Set album art from on_load() attrs

It's available here, so I might as well.  Hopefully this will cut down
on the number of crashes I get, too...

ocarina/body/footer/nowplaying.py

@@ -74,5 +74,5 @@ def on_load(attrs):
 	YEAR.set_text("Year: %s" % attrs["year"])
 	LENGTH.set_text("Length: %s" % attrs["lenstr"])
 	COUNT.set_text("Play count: %s" % attrs["count"])
-	set_art("images/ocarina.png")
+	set_art(attrs["art"])
 	on_like(attrs["like"])

ocarina/body/footer/tiny.py

@@ -62,4 +62,4 @@ def on_pause():
 def on_load(attrs):
 	now_playing.set_text("%s by %s" % (attrs["title"], attrs["artist"]))
 	duration.set_text(" / %s" % attrs["lenstr"])
-	set_art("images/ocarina.png")
+	set_art(attrs["art"])

ocarina/callbacks.py

@@ -20,7 +20,6 @@ def on_load(file, attrs):
 	footer.on_load(attrs)
 	queue.refresh()
 	body.cur_page_goto()
-	libsaria.path.lastfm.get_artwork(file)
 callbacks.on_load = on_load
 
 def on_like(like):