Add example code for enabling debugging

[roycaihw]

ref #1039 (comment)

setting debug to true allows the client to log HTTP request sent to the server.

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[roycaihw]

/cc @micw523 @scottilee

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[micw523]

/lgtm
On the other hand, we should probably think about a master document on explaining what the examples do. People won’t necessarily expect this example to teach them how to do debug logging by looking at the file name.

[roycaihw]

I agree. We have examples that cover similar areas. It would be better to de-dup the examples and document their focuses in a README