Adafruit-circuitpython-typing

Added a Protocol for hardware objects with read-only and read/write `value` properties (e.g., `analogio.AnalogIn`, `digitalio.DigitalInOut`, etc).

To use in CPython, `pip3 install adafruit-circuitpython-typing`.

Read the [docs](http://circuitpython.readthedocs.io/projects/circuitpython-typing/en/latest/) for info on how to use it.

Fixed an issue where the link to the documentation in the README pointed to the wrong URL. Thanks 2bndy5!

To use in CPython, `pip3 install adafruit-circuitpython-typing`.

Read the [docs](http://circuitpython.readthedocs.io/projects/circuitpython-typing/en/latest/) for info on how to use it.

Added `Protocol` used for type annotations of PIL `Image` objects. Thank you tekktrik

To use in CPython, `pip3 install adafruit-circuitpython-typing`.

Read the [docs](http://circuitpython.readthedocs.io/projects/circuitpython-typing/en/latest/) for info on how to use it.

Added `Protocol` used for type annotations of `PWMOut` on Blinka platforms that don't support a functional version.

To use in CPython, `pip3 install adafruit-circuitpython-typing`.

Read the [docs](http://circuitpython.readthedocs.io/projects/circuitpython-typing/en/latest/) for info on how to use it.

Add Protocols for representing LED-like classes for use as types in type annotations.

To use in CPython, `pip3 install adafruit-circuitpython-typing`.

Read the [docs](http://circuitpython.readthedocs.io/projects/circuitpython-typing/en/latest/) for info on how to use it.

Added `I2CDeviceDriver` duck typing class for describing classes using `I2CDevice`.

To use in CPython, `pip3 install adafruit-circuitpython-typing`.

Read the [docs](http://circuitpython.readthedocs.io/projects/circuitpython-typing/en/latest/) for info on how to use it.