Update single-link.html

Fixes #623
Looser accept-encoding in header check.
Merge pull request #650 from dhamaniasad/patch-1

Update single-link.html
Merge pull request #651 from jcushman/dev-headers

Looser accept-encoding in header check.
When we're posting to create a new archive we're now doing it
relative to the host. Fixes #588
Now loading our roboto typefaces locally. fixes #581
Added a note to our developer doc about fontdump
Removed Google Analytics. fixes #602
Fixing a broken font path.