sugar: fix disabled default_nick flawed logic

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
Release sugar 0.100.1-20

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
olpc-au-configs: update bootanim logo to au1c

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>
Release olpc-au-configs 0.1-16

Signed-off-by: Martin Abente Lahaye <tch@sugarlabs.org>