[fr] Follow #721

Deprecate IMAGES, CSS, JS constants.
Corrected controllers to be plural in CakeRequest
Merge pull request #724 from bcrowe/controllers-plural

Corrected controllers to be plural in CakeRequest
Turn list of steps into numbered list.
Minor grammar correction: let's
Edits readability
Turn list of steps into numbered list.
Merge pull request #727 from bcrowe/grammar-lets

Minor grammar correction: let's
Merge pull request #728 from guywarner/master

Edits for readability
Add newline to fix numbered list.
Updated docs to use 2.4 in the composer.json example
Merge pull request #729 from alecho/patch-1

Updated docs to use 2.4 in the composer.json example
Grammer fix on en/contributing/code.rst

fixed confusing grammar
Merge pull request #731 from clawsonm/patch-1

Grammer fix on en/contributing/code.rst
Added enviromental variable tip for debug and deployment
Fixed grammar
Update 2-4-migration-guide.rst
Fixed typo in JsHelper

Removed redundant wording.
Update part-two.rst

added php closing tag in template
Updating the text to link to the Where to Get Help page

Previously the doc just said "join us in #cakephp" - it would be better to link to the various ways to get help for the user