Adafruit-circuitpython-esp32spi

Added timeout keyword. Thanks anecdata.

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-esp32spi`.

Read the [docs](http://circuitpython.readthedocs.io/projects/esp32spi/en/latest/) for info on how to use it.

* Added timeout to better handle empty or otherwise unexpected returns.

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-esp32spi`.

Read the [docs](http://circuitpython.readthedocs.io/projects/esp32spi/en/latest/) for info on how to use it.

* Updated `simpletest` and `aio_post` examples to predefine externally connected ESP32 modules.
* These examples now default to boards with pre-defined ESP32 pins (i.e: `ESP32_RST`)
* Renamed _PyPortal_ in both examples with a generic name to allow for other boards with `ESP32_Pin` board definitions like the M4 Metro WiFi.

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-esp32spi`.

Read the [docs](http://circuitpython.readthedocs.io/projects/esp32spi/en/latest/) for info on how to use it.

* Added support for Enterprise WPA2, thanks docmollo!
* Example of using Enterprise WPA2 is located in `examples/esp32spi_wpa2ent_simpletest.py`
* Added `set_pin_mode`, `set_digital_write`, and `set_analog_write` methods to expose equivalent GPIO commands from nina-fw. Thanks cpforbes!

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-esp32spi`.

Read the [docs](http://circuitpython.readthedocs.io/projects/esp32spi/en/latest/) for info on how to use it.

Removes the use of `bytes()` from `examples/esp32spi_aio_post.py`. Thanks jerryneedell!

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-esp32spi`.

Read the [docs](http://circuitpython.readthedocs.io/projects/esp32spi/en/latest/) for info on how to use it.

This release fixes crashes due to header strings not being properly encoded (https://github.com/adafruit/Adafruit_CircuitPython_ESP32SPI/pull/25). Thanks anecdata!

To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).

To use in CPython, `pip3 install adafruit-circuitpython-esp32spi`.

Read the [docs](http://circuitpython.readthedocs.io/projects/esp32spi/en/latest/) for info on how to use it.