More documentation

[Djayb6]

Hi, would it be possible to provide some documention about ramdisk building, for example if we need to patch asr and restored_update, why in the Makefile the encrypted ramdisk is converted to an img3. why launchd is not build with syscall.S unlike previous commits, etc... It would be great !

[posixninja]

Asr and restored are apple programs. This ramdisk kit is for running custom programs without a libc using only syscalls, or allowing you to mount the filesystem and running them chrooted to be able to use iPhone frameworks. Currently our launchd really only copies and runs a few files onto the filesystem.