reword! allow use of accessors on v8 inspect and print

[mmarchini]

Still a work in progress, but this should make it easier to inspect objects:

Still have a few things to do:

• [ ] Validate boundary of accessors
• [ ] Improve error messages
• [ ] Move the address+accessor parsing outside of the Cmd function
• [ ] Use strings as accessors (like ['large-array']) (could be a follow-up PR)

[mmarchini]

I'm also looking into completion for accessors, but this requires changes to LLDB, so it will take some time until we can use it on llnode.

[mmarchini]

Closing, might get back to it eventually