Add an indicator to messages next to the nickname to show if the person in online/offline/away.
We'll need to lazily
WHOchannels when focusing buffers.
NAMESis not enough to get away status, and
WHOcould also get us display name and account name should we want it. A
WHOcache in soju would help, need to review that pending patch.
The WHO cache in soju is now merged.