Adding files for priority with patient preemption
Added more framework necessary to implement algorithms, including more data in the PCB (priority and time of arrival)
Merge branch 'master' of https://github.com/rsingla92/CPUScheduler into PreemptivePriority
Just added API-style comment
Spacing changes
Merging with Lauren's changes
Merge branch 'master' of https://github.com/rsingla92/CPUScheduler into PreemptivePriority
Merge pull request #25 from rsingla92/PreemptivePriority

Preemptive priority - added necessary predicates and laid out groundwork for algorithm implementation