added roadSensor class with attributes, detectLaneEdges method

RoadSensor.java

@@ -0,0 +1,11 @@
+public class RoadSensor {
+    private boolean hazardDetected; //flag for whether a hazard is detected
+    private String roadwayDetails; //stores road quality details, eg wet, uneven
+    private double[] laneEdges; //stores distance to left/right lane edges
+    private String roadSigns; //stores roadsign text for visible signs
+
+    public void detectLaneEdges() {
+        laneEdges[0] = 1;
+        laneEdges[1] = 1.1;
+    }
+}