Fix liner dependency for baduk bin

Fixes the "liner" dependency by referring to its repository in redox's gitlab. This should be later changed to just relying on crates.io/ after it has been updated from 0.4.4 (which currently fails to compile).

Minor changes to the "baduk" (go) game by fixing the changed api for "liner" and adding basic completion for all commands available (tab completion works for the first word at start).