Abaco "list" command should filter by text

[mwvaughn]

After working with the Abaco CLI a lot and amassing multiple actors with semantically informative names, it is a common mistake to do abaco ls <name> instead of abaco ls <actorId>. At present this returns an error, but it could just as easily act as a filter, and this would be much more friendly and useful.

[mwvaughn]

Because Abaco now supports plaintext aliases, it is less ideal to implement abaco ls cool_actor. Instead, specifying a filter command option might be the way to go, something like abaco ls -f "cool_actor"