make the postinst script generate the devuan source list file
Remove devuan.list file in case purge
Fix a typo and move purge to postrm
Fix another typo and add install and dirs file
Update README.md
Removed prerm and added conffiles declaration for apt preferences.d
files
Merge branch 'master' of https://github.com/devuan/devuan-baseconf
No need to add conffiles as preferences.d files are under /etc
Remove preference files in postrm