Merge branch 'develop'
Merge branch 'develop'
Adding support for the new Amazon S3 adapter (AwsS3) that supports the new version of the Amazon SDK to make the ImageProcessingListener work with both of them.
Merge branch 'master' into develop
Adding the new AbstractStorageEventListener that will serve as a base for other listeners
Fixing some coding conventions and refactoring the listeners
Adding an S3 event listener to store files on S3
Adding a test for the S3StorageListener
Adding doc blocks and a test
Fixing the afterSave in FileStorage.php
Adding tests for the ImageHelper
Merge branch 'feature/event-refactoring' into develop

Conflicts:
	Event/ImageProcessingListener.php
Working on the tests and code conventions
Merge branch 'develop' into feature/documentation