Add additional IO Examples for api-v2 release

[brentru]

We should have additional examples in this library which are compatible with API-V2 and based off the recently updated examples within the AIO_Arduino Library: (https://github.com/adafruit/Adafruit_IO_Arduino/tree/master/examples).

Examples involving GPIO (italicized) will support the Raspberry Pi as a target hardware platform.

• adafruitio_00_publish
• adafruitio_01_subscribe
• adafruitio_02_pubsub
• adafruitio_03_multiple_feeds
• adafruitio_04_location
• adafruitio_05_type_conversion
• adafruitio_06_digital_in
• adafruitio_07_digital_out
• adafruitio_08_analog_in
• adafruitio_09_analog_out
• adafruitio_10_dashboard_creation
• adafruitio_11_group_pub
• adafruitio_12_group_sub
• adafruitio_13_rgb
• adafruitio_14_neopixel
• adafruitio_15_temp_humidity
• adafruitio_16_servo

[brentru]

Examples in development are on the v2-examples sub-branch of api-v2: https://github.com/adafruit/io-client-python/tree/v2-examples

[brentru]

Some of these examples are not compatible with the current state of Adafruit IO Python Client Library (api-v2), we'll add them in if requested:

• adafruitio_10_dashboard_creation
• adafruitio_11_group_pub
• adafruitio_12_group_sub

[brentru]

These examples require more features from Adafruit-Blinka. They will be added to this client as it develops further:

• adafruitio_08_analog_in: Requires PWM
• adafruitio_09_analog_out: PWM
• adafruitio_13_rgb: PWM
• adafruitio_14_neopixel: NeoPixel Python Library
• adafruitio_15_temp_humidity: DHT
• adafruitio_16_servo: Servo or Motor Library/PWM

[brentru]

Examples listed have been added and are in the Learning System IO Basics Guides, closing...