closes #844 toh-pt4.html was missing next tutorial chapter link and tutorial flow was getting interrupted by this. I've added next tutorial chapter link(toh-pt5) with corresponding text.
Why the _fragments dir is checked in
Within this repo files generated as a result of shredding the _examples dir ( the contents of the _fragments dir) are checked in so that we can avoid running the
shredder over the entire _examples dir each time someone refreshes the repo ( the shred-full gulp task).
The gulp serve-and-watch shredder is only a ‘partial’ shredder. It only shred’s files in directories changed during
the current session.