Update README.md

README.md

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 # ArduinoQueue
 A lightweight linked list type queue implementation, meant for microcontrollers.
 Written as a C++ template class.
+
+## Example:
+`Queue<int> intQueue;`
+
+all the T's will then be replaced by int.
+
+Note that while the Queue class cleans up the nodes in memory after destructor or dequeue is called, it keeps a copy of the item being queued. So for example if you are queuing pointers, you will need to keep track of the memory behind them.