Updated classes for the Heap and created service station classes.
Continued to update classes for using a Heap.  Changes are also made to
the othe classes based upon the description of the project.
Should be finished with domain portion of code.  Need to begin testing
the simulation and create the user interface.
Finished user interface.  Testing the interface.
Updated variables from int to float to allow for more flexible user
inputs.
Made final adjustments.  Still need to set the output report.
Nothing major