Update Metafix.java

Add signature and description

Author: TobiasNx

metafix/src/main/java/org/metafacture/metafix/Metafix.java

@@ -57,6 +57,11 @@
  * @author Christoph Böhme (Metamorph)
  * @author Fabian Steeg (Metafix)
  */
+@Description("Applies a fix transformation to the event stream. Fix definition is given in brackets.") // checkstyle-disable-line ClassDataAbstractionCoupling|ClassFanOutComplexity
+@In(StreamReceiver.class)
+@Out(StreamReceiver.class)
+@FluxCommand("fix")
+
 public class Metafix implements StreamPipe<StreamReceiver>, Maps { // checkstyle-disable-line ClassDataAbstractionCoupling
     public static final String ARRAY_MARKER = "[]";
     public static final String FIX_EXTENSION = ".fix";