Merge pull request #115 from havvg/master

add info on the StreamWrapper of GaufretteBundle
Added some documentation to Outside the web root chapter
Merge pull request #122 from nass600/outside_web_dir_doc

Added some documentation to Outside the web root chapter
Updated the Imagine library to version 0.4.0

The latest stable release of the Imagine library (v0.4.0) was recently released on packagist.org.
Fixed warning when an extension is not found from pathinfo().
Merge pull request #128 from thanosp/fix-extension-warning

Pathinfo-related notices in generateUrl()
Merge pull request #127 from ubick/patch-1

Updated the Imagine library to version 0.4.0
New minor Imagine versipon
Add image form type
Merge pull request #130 from EmmanuelVella/image-type

Add image form type
Merge pull request #129 from jcrombez/patch-1

New minor Imagine version