Update code for loading cert chain to work with Twisted 14.0.2, without needing a patch. refs #92

Signed-off-by: Daira Hopwood <daira@leastauthority.com>
Add Ramki into the "about us" page
Fix link to Ramki's photo and edit his role.

Signed-off-by: Daira Hopwood <daira@leastauthority.com>