fix: updated all copyright years to 2013

used:
git grep -l 'Copyright (C) [0-9]\{4\} - [0-9]\{4\}' | xargs sed -i '' -e
's/\(Copyright (C) [0-9]\{4\} - \)[0-9]\{4\}/\12013/'
fix: added cc0 license
wip: adding scifio tutorials