Further refined methods.
Merge branch 'master' of https://github.com/cisprocess/skk-cs4230-project-1

Conflicts:
	src/cs4230/pedestrian/math/Statistics.java
	src/cs4230/pedestrian/objects/Cell.java
	src/cs4230/pedestrian/objects/Pedestrian.java
Merge branch 'master' of https://github.com/cisprocess/skk-cs4230-project-1

Conflicts:
	src/cs4230/pedestrian/objects/Pedestrian.java