Make year range validation less strict by default.
Merge pull request #4087 from dereuromark/master-validation-year

Make year range validation less strict by default.
Updating RequestHandlerComponent to accept body of HTTP Delete requests
Adding unit test for HTTP DELETE and RequestHandlerComponent::requestedWith
Fix indentation.

Refs #4108
Fix RequestHandlerComponent not unserializing JSON on DELETE requests.

Fixes #4108
`a` / `an` typo fixes fot API
Fix a fatal error occurs in combination with a scaffold error.
Merge pull request #4117 from antograssiot/master

master - `a` / `an` typo fixes for API
Merge pull request #4122 from chinpei215/master-scaffold-error-fix

Fix a fatal error occurs in combination with a scaffold error.
Update HtmlHelper.php

No need to add `null` to `$options` param as mentioned in the docs section: [Using blocks for script and CSS files](http://book.cakephp.org/2.0/en/views.html#using-blocks-for-script-and-css-files)
Merge pull request #4131 from williamn/master

Update HtmlHelper.php
Merge branch 'master' into 2.6