Note on installing progpoy

Author: teubert

examples/01_Simulation.ipynb

@@ -8,7 +8,9 @@
     "\n",
     "One of the most basic of functions for models is simulation. Simulation is the process of predicting the evolution of [system's state](https://nasa.github.io/progpy/glossary.html#term-state) with time. Simulation is the foundation of prediction (see 9. Prediction). Unlike full prediction, simulation does not include uncertainty in the state and other product (e.g., [output](https://nasa.github.io/progpy/glossary.html#term-output)) representation.\n",
     "\n",
-    "The first section introduces simulating to a specific time (e.g., 3 seconds), using the `simulate_to` method. The second section introduces the concept of simulating until a threshold is met rather than a defined time, using `simulate_to_threshold`. The third section makes simulation more concrete with the introduction of [future loading](https://nasa.github.io/progpy/glossary.html#term-future-load). The sections following these introduce various advanced features that can be used in simulation"
+    "The first section introduces simulating to a specific time (e.g., 3 seconds), using the `simulate_to` method. The second section introduces the concept of simulating until a threshold is met rather than a defined time, using `simulate_to_threshold`. The third section makes simulation more concrete with the introduction of [future loading](https://nasa.github.io/progpy/glossary.html#term-future-load). The sections following these introduce various advanced features that can be used in simulation\n",
+    "\n",
+    "Note: Before running this example make sure you have ProgPy installed and up to date."
    ]
   },
   {