Made Process Insertion Generic

I realized that each algorithm would insert processes in the same way: inserting the process into one or more places in memory. So, I made this part of the super class Policy.
Added Best and Worst Fit to VSP

Did an implementation of Best and Worst Fit VSP where best fit puts the process in the smallest hole and worst fit puts the process in the largest hole. I added a method to the Policy superclass to find the desired fit which should work for Segmentation as well.