Add example of referenced subsystem to template

With inherited parameters

algos/SCDalgo_template/SCDalgo_template_loadfp.m

@@ -2,5 +2,5 @@ function fp = SCDalgo_template_loadfp(obj)
 
 %% Load other fixed parameters
 fp.timing = obj.gettiming;
-
+fp.refmodel.offset = 1; % a fixed parameter
 end
\ No newline at end of file

algos/SCDalgo_template/SCDalgo_template_loadtp.m

@@ -2,5 +2,5 @@ function TP = SCDalgo_template_loadtp()
 % Setup tunable control params
 
 TP.gain = single(2);
-
+TP.refmodel.gain = 4; % another gain used in referenced model
 end