Searcher: compare strings case-insensitive.

src/main/java/moe/nekojimi/musicsearcher/providers/Searcher.java

@@ -92,7 +92,7 @@ public abstract class Searcher
             {
                 if (comparison == null)
                     continue;
-                double score = StringUtils.getJaroWinklerDistance(query.getTextSearch(), comparison);
+                double score = StringUtils.getJaroWinklerDistance(query.getTextSearch().toLowerCase(), comparison.toLowerCase());
                 if (score > fullTextScore)
                     fullTextScore = score;
             }