Modified third app to fit book snippets

Signed-off-by: Andrew Thornton <thor5551@gmail.com>
Merge branch 'master' of https://github.com/GerHobbelt/Developing-a-D3.js-Edge

Signed-off-by: Andrew Thornton <thor5551@gmail.com>

Conflicts:
	highlight/prettyprint.js
Merge branch 'master' of https://github.com/GerHobbelt/Developing-a-D3.js-Edge
Putting Chapter 4 Code In Own Directory

To aid in code progression in the book, I have added chapter 4's code into its own directory to follow the chapters.

Signed-off-by: Andrew Thornton <thor5551@gmail.com>
Commit to make highlight work on my machine.

Signed-off-by: Andrew Thornton <thor5551@gmail.com>
Merge branch 'master' of https://github.com/GerHobbelt/Developing-a-D3.js-Edge

Signed-off-by: Andrew Thornton <thor5551@gmail.com>

Conflicts:
	highlight/prettyprint.js