[Library Manager] New library: arduino-display-lcdkeypad

[dniklaus]

https://github.com/dniklaus/arduino-display-lcdkeypad

Generic Arduino LCD Keypad shield driver, supporting two HW types:

• 4 or 8 bit parallel data bus (LiquidCrystal driver)
• I2C bus and RGB color backlight (LiquidTWI2 driver)

[cmaglie]

done