Merge pull request #2162 from ankitdaf/patch-2

Update HelloWorld.ino - Added two lines for documentation

Author: cmaglie

libraries/LiquidCrystal/examples/HelloWorld/HelloWorld.ino

@@ -17,6 +17,8 @@
  * LCD D6 pin to digital pin 3
  * LCD D7 pin to digital pin 2
  * LCD R/W pin to ground
+ * LCD VSS pin to ground
+ * LCD VCC pin to 5V
  * 10K resistor:
  * ends to +5V and ground
  * wiper to LCD VO pin (pin 3)