deleted old seminar
Squashed 'seminar/' content from commit ccd4245

git-subtree-dir: seminar
git-subtree-split: ccd4245dffe5d3052bbe4fb97d58956f1a77854c
Merge commit 'a51c3552c9e4eae0a17ffe769affff680eae32d0' as 'seminar'