Add section for identifier quoting.
Add more content to the orm migration.
Proof-read as best I can.
Corrections from review.
Merge pull request #1014 from cakephp/orm-migration-pt3

Orm migration pt3
Updates for PSR-4
Merge pull request #1017 from ADmad/3.0-psr4

Updates for PSR-4
Updates to CakePHP installation, remove Composer installation from Advanced
Remove reference to PEAR package
Remove advanced installation docs, move sharing CakePHP to installation
[fr] translate folder /appendices

follow en docs
[fr] follow en translation of views.rst

remove media-view in toctree
Merge pull request #1022 from bcrowe/3.0-installation

3.0 - Updates to CakePHP installation, remove Composer installation from Advanced
Add 'Improve this Doc' button for 3.0
Fix a couple things in sharing CakePHP