Kohdat 1 ja 2
kayttotapaus 1 lisays
kayttotapaus 2 lisays
kayttotapaus 3 lisays
Merge branch 'master' of https://github.com/mikkant/kurssi-kermaa

Conflicts:
	harj3.md
Merge branch 'master' of https://github.com/mikkant/kurssi-kermaa
ei kay