Added SiSType Heading to support REST Api

src/de/tudarmstadt/maki/simonstrator/api/component/sis/type/SiSTypes.java

@@ -64,6 +64,11 @@ public final class SiSTypes {
 	 */
 	public static final SiSType<Double> SPEED = create("SPEED", Double.class, null);
 
+	/**
+	 * [m/s] Speed of an entity
+	 */
+	public static final SiSType<Double> HEADING = create("HEADING", Double.class, null);
+
 	/**
 	 * PHY-Location - x (deprecated)
 	 */