Add page.comments_id support to disqus
Remove slugs
Add comments_id for imported disqus comments
Revert "Add comments_id for imported disqus comments"

This reverts commit f5d10ebec3073258590a4ebbcf1cf8c53ebac2da.
Cleanup extraneous posts metadata
Add comments_id to posts to match disqus comments
Cleanup metadata
Remove slug in favor of permalink for comments id