Tweak the isolinux configuration.

Minor changes to the isolinux configuration:
  - change the name of the entries from 'Live' to 'terminal',
  - use the first entry as the default,
  - boot automatically after 2 seconds.
Allow a USB audio device to be the primary ALSA device.

Modify the ALSA module configuration in the chroot in order that a USB
audio device that is connected to the terminal can be the primary (and
hence default) audio device.
Add support for wanda and rdesktop clients.

Add the TigerVNC (for wanda) and rdesktop clients.