Clarify the use of `${distro_codename}` (#20)
Clarify the use of `${distro_codename}` (#20)

* Clarify the use of `${distro_codename}`

Related to #19

* fix placement of explanation

* Add documentation about raspbian

wuvt/wuvt-ansible,wuvt/wuvt-ansible,wuvt/wuvt-ansible,wuvt/wuvt-ansible