[VA] {bugfixing} I15 EnemyManagement movement

#15 fixed issue with waypoint finding,  testEnemiesMoveOneWay() now
passes.
[VA] {refactoring} I15 EnemyMgmt movment test

#15 added a new test to see if enemies can turn around.
[VA] {other} I15 Simple Enemies implemented.

closes #15