Console prompt wrong

[russellallen]

Two part issue:

1. Docs show console prompt as Self 0 but standard prompt should be something like owner@127.0.0.1 0>
2. Prompt fails to get hostname, so actual prompt is owner@[unknown hostName] 0> which looks like a debugger or similar.

Suggested fix:

• Revert to Self 0 by default
• Allow pluggable prompts, and fix hostName

Alternative:

• Pick a nice default prompt, and make that default (and update docs)