A native Go reader for the old Microsoft Word .doc binary format files

Example usage:

f, _ := os.Open(`testData\simpleDoc.doc`)
buf, err := ParseDoc(f)
if err != nil {
  // handle error
}
// buf now contains an io.Reader which you can save to the file system or further transform

A great big thank you to Richard Lehane. His (https://github.com/richardlehane/mscfb got me started, his https://github.com/richardlehane/doctool project got me closer and his answer to questions via email helped get me to the finish line. Thanks Richard!