Up-to-date default configs

Signed-off-by: Shahbaz Youssefi <ShabbyX@gmail.com>
Fix an rtai-config bug with --config

Signed-off-by: Shahbaz Youssefi <ShabbyX@gmail.com>
Install an optional script to load RTAI on boot

Signed-off-by: Shahbaz Youssefi <ShabbyX@gmail.com>