Fixed: Files with no tags cause qualityWeight error/ui freeze

Fixes #199

src/NzbDrone.Core/MediaFiles/TrackImport/ImportDecisionMaker.cs

@@ -107,6 +107,8 @@ private ImportDecision GetDecision(string file, Artist artist, ParsedTrackInfo f
                 {
                     localTrack = new LocalTrack();
                     localTrack.Path = file;
+                    localTrack.Quality = new QualityModel(Quality.Unknown);
+                    localTrack.Language = Language.Unknown;
 
                     decision = new ImportDecision(localTrack, new Rejection("Unable to parse file"));
                 }