Use prebuilt nginx package with geoip.

This commit adds a pre-built nginx debian package to the repository
and installs nginx using that package.  Ideally, this package would be
stored on an asset server or apt repository.

Despite the loss of history, we might consider a git-filter-branch
after we are able to remove this asset from the repo.
Use newer nginx cookbook with option to disable status plugin.
[nginx] Pidfile attribute is pid_file not pid
Merge pull request #80 from stevendanna/nginx-package

Use custom-built nginx package with GeoIP support.