Update poclbm with preferred fix for the TypeError bug
live-miner-config hook: style fixes to match other live-config hooks
Change window manager to i3
dkms-fglrx hook: redirect output to /var/log/live
poclbm-wrapper: don't specify device

poclbm will automatically detect one or more suitable GPU devices.
Add support for custom xorg.conf file

An example file is included for dual-card operation.
Generate an xorg.conf at boot time

Seems to be necessary to get Xorg to use multiple graphics cards.