Develop testing guidelines on new releases

[litghost]

The bladeRF firmware (FX3 and FPGA) are not that simple. We should develop a standard test-suite to verify functionality. I have started drafting notes on what it should cover https://github.com/Nuand/bladeRF/wiki/Release-testing . As I have been focusing on flashing and now USB spec compliance, I have listed tests that come to mind with those are in focus. However there should be additional tests that covers:

• RF sample through-put (bandwidth, latency, under/over flow, etc)
• RF front-end tuning
• RF gain configuration

There will also need to be tests for exposed external API's, like osmosdr and eventually extio.dll.

Ideally these tests will be fully automated and linked to build outputs. The cross platform aspect of the testing will require testing machines on target platforms with dedicated attached hardware.

[jynik]

Added a preliminary test checklist to the doc/developent directory for the time being.

Over time, we very much should get these tests automated into a suite that we can run on dedicated hardware, as litghost originally suggested.