Copy external log with Image and embedded CUE

- Copy the external log file also in this case:
  * Image
  * Embedded CUE
  * No external CUE
      Setting disabled: Create .cue file even if embedded
  * Without embedded LOG file
      Setting disabled: Write extraction log to "LOG" tag
  * External log file present
- Resolves #335

CUETools.Processor/CUESheet.cs

@@ -1136,6 +1136,11 @@ public void Open(string pathIn)
                     _eacLog = tags.Get("LOG");
                     if (_eacLog == null) _eacLog = tags.Get("LOGFILE");
                     if (_eacLog == null) _eacLog = tags.Get("EACLOG");
+                    _logFiles = new List<CUEToolsSourceFile>();
+                    _defaultLog = Path.GetFileNameWithoutExtension(pathIn);
+                    foreach (string logPath in Directory.GetFiles(_inputDir, "*.log"))
+                        try { _logFiles.Add(new CUEToolsSourceFile(logPath, new StreamReader(logPath, CUESheet.Encoding))); }
+                        catch { }
                     if (cuesheetTag != null)
                     {
                         sr = new StringReader(cuesheetTag);