Update meta information on index.html

Summary: Prior to this diff the meta information on the index page was
still reflecting the owner of the template rather than Mark. Note the
information in the following screenshot:

https://drive.google.com/file/d/0B6vYbVKRyOPDR080RV9fT0VfckE

After this fix the information looks like this:

https://drive.google.com/file/d/0B6vYbVKRyOPDOXBKUjRSb09sdUU

Test Plan: Generate the site and inspect the meta information at the
top level, twitter, and facebook and ensure that there is no mention of
the owner of the template.