Allow testing for sites in maintenance mode.

Any requests with the header X-Test set will be allowed to pass.
Merge pull request #89 from ndlib/nginx-special-case

Allow testing for sites in maintenance mode.
Adding migration script for profile section
Updates to CurateND to use Vanilla data

These are disposable updates necessary to ensure that CurateVanilla's
data can be used against the CurateND code-base.

Adjusting namespace to not include und

Again, as this is data copied from CurateVanilla, the pids have
"sufia" as the prefix and not "und"

Updating curate to include Generic Work