Fixes dependency issues and ads new linux GPIO file class.
Fixes GPIO Pin typos and adds close for unexport
Updated linux_gpio_pin class
Updates raspi adaptor to use new GPIO interface.
Add pin.on and pin.off methods to GPIO_pin interface.
Add pin.on and pin.off methods to GPIO_pin interface.
Refactoring LinuxGpio, adding new module, include I2c and updating adaptor.
Fixes require for LinuxGpio::DigitalPin.
Remove incorrect include.
Renamed module and removed no longer necessary files.
Rename LinuxGpio to LinuxIo, update adaptor.
Update adaptor DigitalPin instance.
i2c updates
Update README.md
fix typo
GPIO pin translation
Remove LinuxIO file and update adaptor.
Update examples with new pin number.