use 'make iso' to build the iso image.

This is because we might want to build for usb

This will hopefully fix the checksum errors

install scripts are splitted into separate scripts. The install variable
should contain a list of the scripts. Each script should be the pkgname with
action as suffix. I.E:

install="$pkgname.pre-install $pkgname.post-install"

enable bootchartd to use kernel process accounting for noticing
all processes.

also fix various little bits around the initramfs init.

modifications to makefile and initramfs init that were left out
from previous commit.

include a modified version of bootchartd, and modify the initramfs
to take start recording of boot sequence to /var/log/bootchart.tgz
if "chart" option is specified in boot command line.

and add a boot option keep_apk_new to keep them. Might be useful during
upgrades.

and generate index if it is missing, even if all packages are up2date.

like when main package depends on subpackages

So we can support multiple kernels in parallel.

Use the built repositories as source for the iso components rather than
just pick whats in a given dir.