Release v1.0.0

Release was tested on PocketBeagle. SDCard image with Buildroot-based image is provided. Write the image to a card, plug PocketBeagle to a USB host port, and you would be ready to record audio:

$ arecord -D hw:CARD=BeagleMic -c8 -t wav -f S32_LE -r24000 out-8ch.wav