Trimming double quotes from fields to prevent them appearing in output

[theSuess]

Most cue files have string without spaces enclosed in doublequotes like this:

TRACK <nr> AUDIO
  TITLE "<TITLE>"
  PERFORMER "<ARTIST>"
  INDEX 01 43:15:45

This would lead cueprint (also cueprint) to output those quotes, making the artist "<ARTIST>"..

cdtext_get now checks for this case and removes the quotes if necessary