[fr] reorganize installation folder, delete advanced-installation
[fr] [en] typos in console-and-shells folder

- add missing orm-cache
Fix version requirements for MySQL.

CakePHP requires 5.1.10, as that is the first version that
information_schema.referential_constraints was added. This table is
required to do foriegn key reflection.

Fixes cakephp/cakephp#3583
Update MySQL version number in other languages.

Refs cakephp/cakephp#3583
[fr] [en] typos and directory names
typos in app.rst
Merge pull request #1372 from cakephp-fr/3.0

3.0 rename classes model/View in conventions
Add unique validation docs, closes #1371
Merge pull request #1377 from bcrowe/3.0-unique-validation

3.0 - Add unique validation docs, closes #1371