added getAverageSpeeds function
Changed updateAverageSpeed database method so that speeds are adjusted
based on the number of cars on the segment. We might want to change how
averageSpeed and the automobiles list are updated in FreewaySegment?
Compiled 101 freeway segments into one file to avoid duplicate segment
names. Added a boolean so that you can disable running the database in
JSONFileGetter
Merge branch 'master' of https://github.com/jamestlynch/CSCI201_Team_FinalProject.git