Move metadata to hidden folder and update references

[piotr-cz]

Description

Move metadata to hidden folder and update references

Specific Changes proposed

This is an update to #3117, which moves files

• CONTRIBUTING.md
• ISSUE_TEMPLATE.md
• PULL_REQUEST_TEMPLATE.md

to own .github folder and fixes references in markdown files.

Reference: GitHub help > Helping people contribute to your project

Requirements Checklist

• Feature implemented / Bug fixed
• If necessary, more likely in a feature request than a bug fix
  • Unit Tests updated or fixed
  • Docs/guides updated
  • Example created (starter template on JSBin)
• Reviewed by Two Core Contributors

[gkatsev]

Is there a specific reason why having it in the .github folder be better? I think I would prefer to keep them in the root of the project.

[gkatsev]

Thinking about this some more and talking with @brandonocasey, I think this would be good if we keep CONTRIBUTING.md in the root of the project but move the templates into the .github folder. CONTRIBUTING.md is/should be more than just a link that github links to at the top of issues.

[piotr-cz]

The reason is to move files that don't have to be in the root repo folder to clean it up.
I'll update PR to keep the CONTRIBUTING.md file where it is now.

[gkatsev]

Tests are failing for a separate reason.