Initial PKGBUILD and Install

This setup should correctly install the custom busybox init to ``/usr/lib/minirc/busybox`` install the rc script to ``/sbin/rc.d`` (and modify the default inittab to that change).

It should also correctly link ``/root/init`` and ``/sbin/{halt,poweroff,reboot}`` to busybox, and prompt the user to make the correct appendix to their kernel parameters of their bootloader.