updated slides
Merge branch 'master' of https://github.com/bastelfreak/raid
Merge branch 'master' of https://github.com/bastelfreak/raid
Merge branch 'master' of https://github.com/bastelfreak/raid
Merge branch 'master' of https://github.com/bastelfreak/raid
Merge branch 'master' of https://github.com/bastelfreak/raid
Merge branch 'master' of https://github.com/bastelfreak/raid
update slides