Set up a working base system

.gitignore

README.md

board/rgbmatrix/busybox.fragment

board/rgbmatrix/cmdline.txt

board/rgbmatrix/config.txt

board/rgbmatrix/install

board/rgbmatrix/overlay/etc/motd

board/rgbmatrix/post-image.sh

board/rgbmatrix/try

board/rgbmatrix/users

configs/rgbmatrix_defconfig

package/busdisplay/busdisplay.hash

package/python-rgbmatrix/Config.in

package/python-rgbmatrix/python-rgbmatrix.hash

package/rpi-rgbmatrix/rpi-rgbmatrix.hash

setup.sh