Comment 2 for bug 439366

Proposed patch, this adds ramdisk_id and kernel_id to output as described at
http://docs.amazonwebservices.com/AWSEC2/latest/CommandLineReference/ApiReference-cmd-DescribeImages.html

It also fixes a bug where 'image availability' contains a space instead of a tab after it.

Patch is against current branch lp:eucalyptus/euca2ools-1.0 .