[Packaging Request] unity-greeter (lightdm dependency)

This package needs to be packed for trisquel 6.0 to be able to install/run lightdm.

Some stuff need to be changed in the source code (its GPLv3), like replacing the ubuntu logos:
Replace data/cof.png with a trisquel logo
Replace data/ubuntu_badge.png with a trisquel logo

and probably some more, please check and help: http://archive.ubuntu.com/ubuntu/pool/main/u/unity-greeter/unity-greeter_0.2.8.orig.tar.gz