Tweaking site theme to allow pages from subdirectories (necessary for opt out page to work efficiently)

Signed-off-by: Matt Bernhardt <mjbernha@mit.edu>
Adding secure opt-out page for faculty to add their email address to a do-not-contact list

Signed-off-by: Matt Bernhardt <mjbernha@mit.edu>
Merge pull request #98 from matt-bernhardt/master

Adding opt-out page