Various fixes

[thewhaleking]

• in do_transfer, we check the balance with coldkeypub.ss58, but then retrieve it from the dict with coldkey.ss58. Resolve this.
• Handle KeyboardInterrupt in CLI to gracefully exit (no traceback)
• Handle race conditions where self.metadata may not be set before finishing initialising runtime (this may need optimised in the future)
• Error description output
• Taostats link fixed
• Fixes not showing confirmation if --no-prompt is specified on stake remove

Fixes #202