Michael Rose 869a0e5b73 Refactor seo.html and support OpenGraph image overrides (#1321) ... - Refactor seo.html include and add `page.header.og_image` override - DRY up handling of page images (`page.header.image`, `page.header.overlay_image`, `page.header.teaser`, and `site.og_image`). - Allow page images to be set with `header.og_image` page variable in YAML Front Matter as per feature request in #1316. - Add sample posts for testing `og_image` override - Set author bio as site OpenGraph default image - Document `page.header.og_image` OpenGraph override - Update CHANGELOG and history Close #1316		2017-10-26 15:50:13 -04:00
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images	Refactor seo.html and support OpenGraph image overrides (#1321)	2017-10-26 15:50:13 -04:00