add working fibonacci examples, while and recursive

for fibo(10) the difference is 270 vs 6500 instructions, a lot
apparently there are as many calls as the fibs result, i.e. 55, for
recursive

codes/a_fibo_recur.soml

@@ -0,0 +1,22 @@
+class Object
+  int fibonaccir( int n )
+    if_plus( n - 1 )
+      int tmp
+      tmp = n - 1
+      int a = fibonaccir( tmp )
+      tmp = n - 2
+      int b = fibonaccir( tmp )
+      return a + b
+    else
+      return n
+    end
+  end
+  int fib_print(int n)
+    int fib = fibonaccir( n )
+    fib.putint()
+    return fib
+  end
+  int main()
+    return fib_print(10)
+  end
+end

codes/a_fibo_while.soml

@@ -0,0 +1,18 @@
+class Object
+  int fibonaccit(int n)
+      int a = 0
+      int b = 1
+      while_plus( n )
+        int tmp = a
+        a = b
+        b = tmp + b
+        n = n - 1
+      end
+      b.putint()
+      return b
+  end
+
+  int main()
+    return fibonaccit( 10 )
+  end
+end