NEW CONTRIBUTION: HD44780 LCD display controller

For those that has one of these displays without an I2C module attached. It uses 6 GPIO pins in total but well, yeah.

@rilpires

Created https://github.com/mongoose-os-libs/hd4478 , added you as an admin.

Please move your repo to https://github.com/mongoose-os-libs/hd4478 .

Thank you!