Merge remote-tracking branch 'docs/3.0' into 3.0
Added missing `config` path to getting-started/cakephp-folder-structure.rst
Removed Config path from "The Src Folder"

and used that description in the above path description
Merge pull request #1560 from elboletaire/add-config-path

3.0 - Add config path to folder structure@getting started