* feat: mashable parser
As usual the date is giving me issues because of formatting
discrepancies:
AssertionError: '2016-12-13T22:33:06.000Z' == '2016-12-14T03:33:06.000Z'
Not sure how we wanna deal with Twitter card embeds that don’t show up?
Also, image credits did not show up in preview.
* test: fixed date format
* transforming .image-credit to figcaption
