modify atan to atan2

Author: kevinzwang

Robot2018/src/org/usfirst/frc/team199/Robot2018/commands/PIDTurn.java

@@ -115,7 +115,7 @@ public PIDTurn(double[] point, DrivetrainInterface dt, SmartDashboardInterface s
 		double dx = point[0] - AutoUtils.position.getX();
 		double dy = point[1] - AutoUtils.position.getY();
 
-		double absTurn = Math.toDegrees(Math.atan(dx / dy));
+		double absTurn = Math.toDegrees(Math.atan2(dx, dy));
 		target = absTurn - AutoUtils.position.getRot();
 
 		if (Robot.dt != null) {