RAAML — GSN concrete syntax definitions

In Figures 9.104 and 9.105 the RAAML specification makes suggestions on the concrete syntax (in this case the graphical notation) of GSN elements in which the metamodels (sets of abstract syntax) are defined. Defining concrete syntax for GSN elements would seem to be out of the scope, where SACM and GSN itself should be leveraged for these definitions rather than defining them in RAAML.

Revise the text so that it is clear that SCSC/GSN defines the graphical notation.