Added new implementation of FileVehicle

New FileVehicle uses symfony/finder and symfony/filesystem for working with files. It allows better definition of which files should be included.
Create also empty directories not only files
Add Teleport\Transport\FileVehicle with finder/filesystem support

Adds a more flexible FileVehicle using symfony/finder and symfony/filesystem
Also adds vehicle_parent_class support to Teleport\Transport\Transport so extended base classes are loaded by MODX
Add Teleport\Transport\FileVehicle with finder/filesystem support

Merge branch 'pr/7'

* pr/7:
  Add Teleport\Transport\FileVehicle with finder/filesystem support
  Create also empty directories not only files
  Added new implementation of FileVehicle