Add debugger support to ND version

[dpwhittaker]

When you build the ND version again, you may also want to add this change to JsEngine.NativeMethods:
dpwhittaker@53388e3#diff-5d67ff4aeda70590cede90599ce6f971

This allowed me to add --inspect as a node parameter and connect the chrome debugger to javascript in initial testing.

If there is another way to do this, let me know.

[prepare]

Wonderful!
I will test it.

[prepare]

EARLY preview

see 1436b56

for latest pre-built binary (espr_nd) , on win64, VS2017

see https://github.com/prepare/espresso_release_tmp

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pic 1: add --inspect before our hello.espr module

pic 2: epresso-nd starts with --inspect

pic 3: debugger (chrome) attached

[prepare]

I plan to review original's node-inspector (js version)
and figure out how to wrap it.

[prepare]

@prepare's note:

from https://chromedevtools.github.io/devtools-protocol/

... your application can discover available pages by requesting: http://localhost:9222/json and getting a JSON object with information about inspectable pages along with the WebSocket addresses that you could use in order to start instrumenting them. ...

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pic 1: with chrome , goto http://localhost:9222/json

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pic 2: get debug info, copy it

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pic 3: paste to another page, the chrome debugger will attach the debug session

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about debugger-protocol see: https://chromium.googlesource.com/v8/v8/+/master/src/inspector/js_protocol.json