[tor-bugs] #29762 [Core Tor/Chutney]: Update the README for new features

[Tor Bug Tracker & Wiki]

#29762: Update the README for new features
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     Reporter:  teor              |      Owner:  teor
         Type:  defect            |     Status:  assigned
     Priority:  Medium            |  Milestone:
    Component:  Core Tor/Chutney  |    Version:
     Severity:  Normal            |   Keywords:  fast-fix
Actual Points:                    |  Parent ID:
       Points:                    |   Reviewer:
      Sponsor:                    |
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 We've added a few new features to chutney recently, so we should update
 the README. (And keep it up to date when we make future changes.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29762>
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