Implement a unit test package for the Feather52

[microbuilder]

One of the nicer features of Mynewt is the built in unit test framework, as well as HW simulation (although this doesn't yet take into account the BLE stack).

A simple test suite should be implemented to get familiar with the testutil library, as described here: http://mynewt.apache.org/os/tutorials/unit_test/

We can extend this later to proper production tests that can be used to verify the hardware coming off the production line.

[microbuilder]

Notes on creating and running tests should be added to https://github.com/adafruit/Adafruit_Mynewt/blob/master/docs/12_UnitTests.md

[microbuilder]

An initial test can be to make sure the config settings in #8 are properly restored after a factory reset, and that the values can be updated in code.

[hathach]

that is nice, it is a PITA to set these up previously :D

[microbuilder]

Believe me I remember :) This is why i like Mynewt so much ... they've thought of all the important details for real world deployments and made them as easy as possible (for an embedded project anyway).

[microbuilder]

The new FIFO module is a good place to test this out since it can easily run on a simulator (BLE doesn't have simulator support yet), and it's an important component worth fully testing anyway.

[microbuilder]

Add documentation on creating and running unit tests here: https://github.com/adafruit/Adafruit_Mynewt/blob/master/docs/12_UnitTests.md

Implemented the basic plumbing for FIFO tests via cb44c18868b66a07d5d8ce4b3d40233da4e3dee4, tested natively on OS X

[microbuilder]

Closing this for now since the skeleton code is there, but the old FIFO tests should be added to the mynewt repo as a minimum.

[microbuilder]

Perfect, thanks.