Merge branch 'feature/symfony/filesystem' into feature/component/filesystem
Create Axstrad\Filesystem component
Add directory Scanner interface and a concrete implementation.
Add concrete FileBag implementations.
Add concrete Scanner implementations
Enhance BaseIteratorScanner

It can now be customised to:
 - create a new object for each file found during iteration. The object's class is obviously configurable.
 - use either the SplFileInfoBag or FileBag. If you don' explicitly set it to use ether it'll continue to use BaseBag for BC reasons.
Add missing test for Axstrad\Filesystem's ScannerIteratesTrait
Move Axstrad\Component\OptionsResolver to Axstrad\Symfony\OptionsResolver
Remove Axstrad\SymfonyBridge\WorkForce, it's too early for it.
Merge branch 'develop' into release/axstrad-filesystem

Conflicts:
	phpunit.xml.dist
Add copyright notice and license info
Prepare for release
Merge branch 'release/axstrad-filesystem' into develop