Further documentation updates

PPI/AnnotationRouter.hh

@@ -48,9 +48,10 @@ namespace module {
 
         The \a AnnotationType template parameter defines the routing key. This annotation must
         support the following operations:
-        \li Comparison with '<'
-        \li Copy-construction
-        \li Output streaming to an ostream via '<<'
+        \li Comparison with '<' (\c LessThanCompatable concept)
+        \li Copy construction and copy assignment (\c Copyable und \c Assignable concepts)
+            (e.g. via compiler synthesized copy constructor and assignment operator)
+        \li Output streaming to an ostream via '\c <<' (\c OutputStreamable concept)
 
         The following annotation can be used to route the packets according to a mac address.
         \code