replaced facttest.lua with fibtest.lua

Optimized the NaN box to be byte aligned, performance under the fibtest.lua script improved by ~2.5 seconds (~31 before ~28.5 after on cpunch's machine)
also cleaned up some misc. comments

examples/fibtest.lua

@@ -0,0 +1,11 @@
+local function fib(num)
+    if num <= 1 then
+        return num
+    else
+        return fib(num-2) + fib(num-1)
+    end
+end
+
+for (var i = 1; i < 40; i++) do
+    print("The fib number of " .. i .. " is " .. fib(i))
+end

examples/fortest.lua

@@ -1,13 +0,0 @@
-local function fact(num)
-    var total = 1
-    for (var i = num; i > 0; i = i - 1) do
-        total = total * i
-    end
-    return total
-end
-
-for (var x = 0; x < 1000; x=x+1) do
-    for (var z = 0; z < 100; z=z+1) do
-        print("The factorial of " .. x .. "." .. z .. " is " .. fact(z))
-    end
-end