Deb packages support for conffiles/postinst

[janisz]

How to create deb package with configuration files? allegro/marathon-consul #113

dh_installdeb(1) automatically flags any files under the /etc directory as conffiles, so if your program only has conffiles there you do not need to specify them in this file. For most package types, the only place conffiles should ever be is under /etc, and so this file doesn't need to exist.

[janisz]

I found a sollution but it require small change in debber debber/debber-v0.3#2
Once it's merged configuration files could be specified by creating resources/debian/conffiles