Update Box 3 Readme for ezButton

Author: rglidden

003-label-maker/README.md

@@ -1,6 +1,6 @@
 # 003 - Label Maker
 
-The Label Maker requires one library to be installed in the Arduino IDE before it can be used:
+The Label Maker requires two libraries to be installed in the Arduino IDE before it can be used:
 
 ## LiquidCrystal I2C
 
@@ -11,9 +11,25 @@ To install the LiquidCrystal I2C library, follow these steps:
 3. Click on the `Include Library` menu
 4. Click on the `Manage Libraries...` menu
 5. In the `Library Manager` window, type `LiquidCrystal I2C` in the search box
-6. Click on the `LiquidCrystal I2C` entry in the list
+6. Click on the `LiquidCrystal I2C by Frank de Brabander` entry in the list
 7. Click on the `Install` button
 
 Additional information about the LiquidCrystal I2C library can be found on the
 [LiquidCrystal I2C GitHub repository](https://github.com/fdebrabander/Arduino-LiquidCrystal-I2C-library)
 
+## ezButton
+
+To install the ezButton library, follow these steps:
+
+1. Open the Arduino IDE
+2. Click on the `Sketch` menu
+3. Click on the `Include Library` menu
+4. Click on the `Manage Libraries...` menu
+5. In the `Library Manager` window, type `ezButton` in the search box
+6. Click on the `ezButton` entry in the list 
+    - **NOTE:** There is also a library called `EZButton`. This is _not_ the correct library. Pick the one with a lower case `ez`.
+7. Click on the `Install` button
+
+Additional information about the ezButton library can be found on the
+[Arduino Get Started](https://arduinogetstarted.com/tutorials/arduino-button-library) site.
+