initial: change to CC-BY-SA-3.0

Signed-off-by: Stephan Linz <stephan.linz@clondiag.com>
initial: add scripts

Signed-off-by: Stephan Linz <stephan.linz@clondiag.com>
initial: add release-notes

Signed-off-by: Stephan Linz <stephan.linz@clondiag.com>
initial: add yocto-tutorial

Signed-off-by: Stephan Linz <stephan.linz@clondiag.com>