Generic LcdKeypad shield driver with driver type auto selection

This release provides:

• a copy of the LiquidTWI2 driver sources, so the LiquidTWI2 is no longer required separately
• a bug fix in the automatic LiquidTWI2 / LiquidCrystal driver selection

Generic LcdKeypad shield driver with driver type auto selection

This release supports LcdKeypad Shields based on LiquidCrystal (standard Arduino library) and also LiquidTWI2 devices (I2C based), while the driver type will be choosen automatically according to the presence of the actually inserted HW.

Generic LcdKeypad shield driver

This release supports LcdKeypad Shields based on LiquidCrystal (standard Arduino library) and now also LiquidTWI2 devices (I2C based).

Generic LcdKeypad shield driver

This release supports LiquidCrystal (standard Arduino library) and now also LiquidTWI2 devices (I2C based).

Fix for potential backlight high current issue.

This release addresses the potential backlight high current issue, see #1.