iquik: try different default config file names.

Try /etc/quik.conf, /boot/quik.conf and /quik.conf.

Also clean up 'quik' tool a bit.

Signed-off-by: Andrei Warkentin <awarkentin@vmware.com>
iquik: bug fixes and docs

- Parse paths correctly for !ls
- Add !cat to list files
- Add back initrd-size (for compat only with old quik.conf files)
- Better error messages
- Document PDQ directions

Signed-off-by: Andrei Warkentin <awarkentin@vmware.com>
iquik: update distrib bins

Newer prebuilts

Signed-off-by: Andrei Warkentin <awarkentin@vmware.com>