Content translation/Machine Translation/Apertium/Packaging/binNMU

Apertium packages depends on hfst, cg3 libraries. These libraries often need update, while core packages are updated less frequently. bin-NMU is needed to avoid entire rebuild (and version bump) and quick upload.

Steps
1. Increment version

2. Update dependencies in debian/control.

3. Rebuild package.

ToDo

 * Document bin-NMU + gbp buildpackage.
 * Fix errors with cowbuilder.