Merge pull request #5 from aguibert/master

UI Code
UI Code for Truck

Still have a problem of getting a null when trying to get a truck. When
I call getPackagesOn it tries to get a truck but returns a null even
after I call create truck.
Merge pull request #6 from aguibert/master

Pull Andy
Finished UI Code

Changed methods involving truck state
Attempted merge
fixed add create truck
Merge pull request #3 from lrohret/master

UI Code