WHEN

Dh_ada_library appends lintian override to existing files, while
dh_lintian blindly overwrites them, so it is better to run
dh_ada_library after dh_lintian.

As most of the job is installing files, good logic says that we should
come before dh_link/dh_compress/dh_fixperms.

BUILD

Version numbering: X.Y, where X only increases when source changes are
needed in reverse dependencies.
