Add .nojekyll file on deploy

This makes page builds faster on GitHub's side, since they know they
don't need to compile anything (Octopress does it for us).

Change-Id: I61caf57956e75854cc829a6c7c606594fda51fcc
Reviewed-on: https://gerrit.causes.com/22827
Tested-by: Aiden Scandella <aiden@causes.com>
Reviewed-by: Greg Hurrell <greg@causes.com>