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
Fixed nginx config
Small typo fix
updated Controller::render() info
Removed an unnecessary 'also'
Merge pull request #454 from spiliot/patch-2

Removed an unnecessary 'also'
attached to loaded and charset for application content types
Merge pull request #447 from dereuromark/2.3changes

attached to loaded and charset for application content types
Updating layout
slightly improve info about created and modified fields
Merge pull request #452 from tenebrousedge/master

Improved nginx config
Added info about the new 'required' attribute
fix typo
translation HtmlHelper into Japanese
Added info about new 'ignoreMissing' option
updated info about AuthComponent::$unauthorizedRedirect
typo / grammar fixes
Fix MethodNotAllowedException typo.
Merge pull request #456 from Phally/patch-1

Fix MethodNotAllowedException typo.