Added files for wpa_supplicant to installer.
Added files for dependencies of wpa_supplicant to installer.
Replaced 'eth0' with 'iface' variable.
Replaced 'eth0' with '$interface' so dns also works for other ifaces.
Added dependency packages for wpa_supplicant to the list.
Fixed error in mkdir statement.
Fixed psk for RTIRACE.
Added a driver package to be loaded during installation.
Implemented installing over wireless in installer-config.txt.

This should be moved scripts/etc/init.d/rcS eventually, but for now this
seems to work \o/.