client: add dfi alias

- `dfi` is now primary unified command (saves fingers)
  * `docker-finance` is still available, as this is only an addition
- Also fixes missing line continuation during install (#104)

client/src/docker/completion.bash

@@ -97,3 +97,6 @@ function docker-finance::completion()
 
 complete -F docker-finance::completion docker.bash
 complete -F docker-finance::completion docker-finance
+complete -F docker-finance::completion dfi
+
+# vim: sw=2 sts=2 si ai et