Normalize file name format in on disk db (fixes #479)

files/filenames_darwin.go

@@ -0,0 +1,11 @@
+package files
+
+import "code.google.com/p/go.text/unicode/norm"
+
+func normalizedFilename(s string) string {
+	return norm.NFC.String(s)
+}
+
+func nativeFilename(s string) string {
+	return norm.NFD.String(s)
+}