Document TimeHelper::nice takes $format as param

As per the [TimeHelper::nice source code](https://github.com/cakephp/cakephp/blob/master/lib/Cake/Utility/CakeTime.php#L349), it can take $format as param. 

So Document that in the book.
begin translation 'Html' chapter
translation HtmlHelper into Japanese
Fix MethodNotAllowedException typo.
Merge pull request #456 from Phally/patch-1

Fix MethodNotAllowedException typo.
fixed underline length for development/testing in ja
fixed syntax, removed remaining english and translated some of staff for development/testing in ja
removed lines were forgotten to delteded for 2.1 migration guide in ja
Merge pull request #458 from hiromi2424/fix-21-migration

removed lines were forgotten to delteded for 2.1 migration guide in ja
Merge pull request #457 from hiromi2424/fix-testing

Fixes development/testing in Ja
Fix AppHelper path in CakePHP 2.0 migration guide
Merge pull request #460 from kdelchev/master

Update AppHelper path in CakePHP 2.0 migration guide
Remove oracle, its not actually supported.
Update en/core-libraries/components/authentication.rst

Added a warning about allow all not working with scaffolded methods
Merge pull request #461 from jsdavis02/patch-1

Update en/core-libraries/components/authentication.rst
Fix a bunch of formatting errors.
clarification for helper callbacks
typo
Update fr/tutorials-and-examples/simple-acl-controlled-application/simple-acl-controlled-application.rst

J'ai changé "nom_user" en "username" et "mot de passe" en "password", sinon le tuto ne fonctionne si on 'copie-colle' les textes et de plus les mots de passe ne sont pas haché(conventions CakePHP).
Update en/core-libraries/helpers/js.rst

Small correction