Merge pull request #3 from jarade/master

GUISimulator.java started and added to SimulationRunner.java
Bug fixes, debug code, finish functions

Fixed some bugs where the wrong array was being used
Adding some debugging code
Filled out 'processQueue' function
GUISimulator.java edited to be more capable. Have a basic UI in place with button that checks for negative CarPark values. Have the button check all the user inputted values to make sure they are in the correct format. Only one of these errors can occur at a time because java stops the continuation of the method.