add navigationtable to path
add a singleton of the truck. This should be used for to save the state of the truck.
Implement convertToCarPath method
Merge branch 'master' into graphPath_to_carPath
Add ForkliftPath class to wrap forklift navigation commands
Move the forklift path creation to the Forklift class
Implement a human-readable toString method on ForkliftPath class
Fix a bug in ForkliftPath
Corrected some values on edges in warehouse graph
Code cleanup
Add a unit test for the ForkliftPath class
More code cleanup