NOTE: This was unintentionally squashed so some details were lost
* Major updates to build_linux to support the current archiso scripts
* Most customize_airootfs.sh code has been moved elsewhere
* Using static files or links where possible
* Generating other files as needed in build_linux
* Syslinux configuration has been simplified
* Dropped i3
* Dropped rxvt-unicode in favor of termite
* Font rendering broke one too many times
* Dropped NetworkManager in favor of iwd/systemd-networkd
* Script work is brought into better focus
* New layout will be used to better package the python scripts
* No hidden folders (they will be hidden at build time)
* All building should be done under setup/
* Avoids ambiguous .bin/.cbin folders at root of project
