move legacy code to separate branch

Data/ingsw/0721_13/correct.txt

@@ -0,0 +1,18 @@
+<pre>
+function next
+input Integer x;
+output Integer y;
+algorithm
+   y := 1 - x;
+end next;
+
+class System
+Integer x;
+initial equation
+x = 0;
+equation
+when sample(0, 1) then
+    x = next(pre(x));
+end when;
+end System;
+</pre>

Data/ingsw/0721_13/quest.txt

@@ -0,0 +1,4 @@
+Si consideri l'automa seguente:
+0->1 e 1->0
+
+Quale dei seguenti modelli Modelica fornisce un modello ragionevole per l'automa di cui sopra.

Data/ingsw/0721_13/wrong1.txt

@@ -0,0 +1,18 @@
+<pre>
+function next
+input Integer x;
+output Integer y;
+algorithm
+   y := 1 - x;
+end next;
+
+class System
+Integer x;
+initial equation
+x = 0;
+equation
+when sample(0, 1) then
+    x = next(pre(x));
+end when;
+end System;
+</pre>

Data/ingsw/0721_13/wrong2.txt

@@ -0,0 +1,18 @@
+<pre>
+function next
+input Integer x;
+output Integer y;
+algorithm
+   y := x;
+end next;
+
+class System
+Integer x;
+initial equation
+x = 0;
+equation
+when sample(0, 1) then
+    x = next(pre(x));
+end when;
+end System;
+</pre>