Prepare examples for CHIRIMEN with node backend

[dynamis]

Overview Description (Goal of this issue)

prepare new repo for examples. We'll merge the old/new in the future (if it's possible, reasonable). In case it's difficult (or not reasonable) to merge them, just keep old one as is and maintain new exmaples repo.

note: be careful to avoid RPi3 board specific dependencies (as far as possible)

Action Items (Requirements to close this issue)

• WONTFIX rename examples repo to examples-echigo or something (see #195)
• WONTFIX create new examples-node or something to include new code examples for polyfills-node.
• [x] publish examples in the new repo

[dynamis]

The new repo introduced with #195 includes examples: https://github.com/chirimen-oh/chirimen-raspi3