Further iterative improvements for the PHAR website

[jrfnl]

Some ideas for future enhancements:

• Use the GH API to retrieve the publish date of releases and add the release date to the PHAR archive page.
  Notes:
  • Needs to be conditional on the GH API being available at the time the script runs.
  • May need access to a token to prevent running into rate limits.
• Automate generation of the phive.xml file.
• Add an RSS feed.

Also see prior discussion about this in issues #107 and #1156