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
use source on travis, avoiding github api limits
remove deprecated entries in gitignore
update Imagine dependency to 0.4.* patch versions
Merge pull request #133 from havvg/master
added a phpcr loader
Merge pull request #134 from Burgov/master

Added a data loader for PHPCR
refactored PHPCR loader
minor tweaks to the AbstractDoctrineLoader
Add route options to routing loader
typo fixes
no need to download composer
Add config test and readme doc