Give examples explaining how to contribute
Originally created by @bertagaz on #6169 (Redmine)
Small tips on how to hack on differents stuffs in Tails, so that people
can quickly get some clues about it.
For example a simple example about how to add a package in Tails:
`echo cowsay >> config/chroot_local-packageslists/tails-common.list`
This was decided during the “How to get more contributors” discussion at the 2013 summit.