Add section for identifier quoting.
Add more content to the orm migration.
Update readability in entities docs
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
Update plugin docs for new ORM and other changes.

Update the docs to reflect changes in the ORM. Clean up formatting and
a few other small issues. requestAction doesn't have the same
limitations as it used to have.
Add example of how TableRegistry should work with plugin tables.
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
Fix up docs based on review feedback.
Fix dash.
Add 'Improve this Doc' button for 3.0
Fix a couple things in sharing CakePHP