Start new bookmarks tutorial.
Move file into the correct place.
Start new bookmarks app tutorial.

The blog tutorial is getting a bit rusty. It spends a lot of time
covering really basic things without covering any of the cool things
that CakePHP can do.  I think this new tutorial still covers many of the
basic topics and covers some of the good features in Cake3.
Add more headings.
Fix derps.
Make application name consistent.
Grammar fixes for bookmarkr tutorial
[fr] translate new tuto about bookmarks
Remove duplicated file.
Merge pull request #1832 from cakephp/new-tutorial

New tutorial