Fix some typos, improve some descriptions

_data/songs.json

@@ -1,7 +1,7 @@
 [{
 	"title": "Download",
 	"icon": "music",
-	"description": "More than 18.000 songs: From real classics to brand-new.",
+	"description": "Find more than 18.000 songs on USDB, from real classics to the latest hits.",
 	"url_text": "usdb.animux.de",
 	"url": "http://usdb.animux.de"
 },