As a researcher, I see a "Create collection event" option.

This closes #1473
As a participant, I see "Upload genetic & other files" instead of
"Upload genetic/health files" in the menu.

This closes #1474
As a participant I see a warning at the top of the file upload page
saying: "WARNING: While the PGP is a non-anonymous study, some
participants have inadvertently shared private information via file
uploads (e.g. email address). Please read the instructions below
carefully."

This closes #1475
Re-institute automatic enrollment.

This closes #380
Tell users who are enrolling with a willing twin why they are not
enrolled automatically in the 'Enrollment Application Results' step.

refs #380
fix up admin/users/log