Retirement of AudioKitStream and AudioKit library

[pschatzmann]

I am planning to retire the inflexible AudioKitStream and replace it with the following new classes

• I2SCodecStream setup of codec and i2s
• AudioBoardStream same as above but with processing of AudioActions

These classes are based on my new flexible arduino-audio-driver library which supports quite a few i2s based codec chips.

So I suggest that you start to use the new functionality when you need to output audio via some codec chip. The major difference to the AudioKitStream is that you need to indicate your board in the constructor.

Further information can be found in this wiki.