Initial data commit

Task/Ackermann-function/Seed7/ackermann-function-1.seed7

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+const func integer: ackermann (in integer: m, in integer: n) is func
+  result
+    var integer: result is 0;
+  begin
+    if m = 0 then
+      result := succ(n);
+    elsif n = 0 then
+      result := ackermann(pred(m), 1);
+    else
+      result := ackermann(pred(m), ackermann(m, pred(n)));
+    end if;
+  end func;