Changes to be committed:
new file: draft/boards/audioplus.png
new file: draft/boards/audioplus_speakerplus.png
new file: draft/boards/audioplus_speakerplus_micplus.png
new file: draft/overlay/audioplus.md
new file: draft/overlay/audioplus_speakerplus.md
new file: draft/overlay/audioplus_speakerplus_micplus.md