HTML basic element layout learning: html, head, title, body; input, div
Merge pull request #1 from ybdesire/learning

HTML basic element layout learning: html, head, title, body; input, div
Add js at html usage example, with only alert().
Example: html load external js and run the function at the external js.
Add static HTML button/text/checkbox/dropdownlist control example.
Click a button and process the click event at js.
Add files structure content into readme.md
Add a HTML i18n demo by i18next.js.