Added lua scripts and fixed a typo in state machine code

LuaScripts/Chapter5_CountLinkedListNodes.lua

@@ -0,0 +1,9 @@
+function countLinkedListNodes(nodeAddress)
+    local counter = 0
+    local next = readInteger(nodeAddress)
+    while (next ~= nodeAddress) do
+        counter = counter + 1
+        next = readInteger(next)
+    end
+    return counter
+end