Added an "Actions" tutorial.
Changed bitbucket links to github.
Merge branch 'master' into actions_tutorial
Finished the "Preparations" section.
Small fixes.


Signed-off-by: Beliar <KarstenBock@gmx.net>
Added a "Code changes" section
Fixed a typo.
Some small changes.
Finished tutorial.
Changed "Tutorial 4" to "Tutorial 5"