fixing hrefs to point to remote bootstrap and angular libraries
Updated to listing 2-2
updating to listing 2-3
updating to listing 2-4
fixing links to bootstrap and angular libraries
updating to listing 2-5
updating to listing 2-5
updating to listing 2-6
adding the book provided bootstrap and angular libraries so I don't have
to update the book provided code listings.
removing my changes leaving the default book code.
fix to the book code.  removing extra span
This listing did not filter on its own.  I changed the bootstrap and
angular to point to remote reference/sources and then filtering started
working.
adding todo.json provided by the book code
renaming listing 2-13 to 2-14