Restructure page locations and form flow

This implements Anne-Sophie's revised site designs from: https://bugs.caret.cam.ac.uk/browse/PAVO-175

The previous contents of /me are show shown on the home (/) page when logged in. When logged out the home page shows the previous info content.

The form is now @ /upload. The file is uploaded as a content item before the main form is presented.
Can `addendumUrl` be part of the ticket object? Otherwise you can simply do
`var context = _.extend({
    'addendumUrl': oae.api.config.getValue('oae-tickets', 'general', 'addendumUrl')
}, ticket);`