Enables support for package tags

 debtags provides a system to download a database of package tags and keep
 it up to date. A package tag is a small label that gets attached to a
 Debian package to represent one of its qualities.
 .
 A package tag database in the system can enable advanced package search
 techniques, and advanced package browsing functions in programs that
 support it.
 .
 This package has been made as a way to deploy and test package tags
 support until it gets integrated in the normal Debian workflow.