Add some convenience function for dealing the head/tail Some whitespace / cosmetics Add operators == Add operator != Update command handler for this.
Instead of being part of the ping command, create a separate queries command, which is easier for updating. Ie. 'ping' implies "show main screen" but we don't always want that side-effect.
Rework / cleanup the command-handler (and rename for command-parser). Update tests (and integrate with sources)
