Internal simplification of tbp association
Internal simplification of tbp association

Add tbp member to Procedure class.  Set this up in
associate_procedures, so that the code generation can easily determine
whether the procedure is a tbp.

Also internal rename of TypeBoundProcedure.proc->procname

mcfarljm/fortwrap,mcfarljm/fortwrap,mcfarljm/fortwrap,mcfarljm/fortwrap