Merge branch 'dev' into feature/blog

THAT WAS PAINFUL!

model/track_test.go

@@ -31,13 +31,3 @@ func Test_Track_LyricsHTML(t *testing.T) {
         t.Errorf(`track lyrics incorrectly formatted (want "%s", got "%s")`, want, got)
     }
 }
-
-func Test_Track_Add(t *testing.T) {
-    track := Track{}
-
-    want := 4
-    got := track.Add(2, 2)
-    if want != got {
-        t.Errorf(`somehow, we screwed up addition. (want %d, got %d)`, want, got)
-    }
-}