Adding VFS loading tests

These might be too tightly coupled to what we load
Adding Utility helper class
Changing utility class function to static
Implemented the MoveCommand API

Now we need to look at testing it using mocks and the VFS
Impmented MoveCommand and unit tests

This was a difficult one getting the vfsStream to work with the
symfony/finder component. It turns out you need to make sure that the
PhpAdapter is set above the BsdFindAdapter in the finder constructor.
Its currently hard coded and i will look at a way to do this cleaner
than overwriting the symfony source localy.