cakephp/docs — pull request #1614 by antograssiot (2014-08-20 04:07:40+00:00)
Title: 3.0 correct link to ProGit book

- correct the link to `Progit` as it doesn't seems to be `http://progit.org` anymore.
- also correct the git clone command line as specified here : https://help.github.com/articles/fork-a-repo

if this is good to merge, let me know as I already prepare similar change for master branch.