Updated documents (logos were missing).

Signed-off-by: Tobias Lorenz <tobias.lorenz@etas.com>
Contributor agreements added.

Signed-off-by: Tobias Lorenz <tobias.lorenz@etas.com>
Design document and requirement specification uploaded.

Signed-off-by: Tobias Lorenz <tobias.lorenz@etas.com>