Initial revisions to use `SHORTVERSION` instead of `VERSION` when building and serving language packs.
Update `ka-lite` sub-module.
Merge pull request #213 from mrpau/feature/210-extend-update_language_packs-to-only-build-the-right-po-file-per-version

Feature/210 extend update language packs to only build the right po file per version
Merge remote-tracking branch 'refs/remotes/upstream/master' into update_central_master