Fixed problem with non-logged in users fouling up the can submit/comment function.
Update manual test script

Include steps to test email verification
Merge branch 'passwordmandate' of https://github.com/PotatoDumplings/lesswrong into require-email
Revert "Revert "Merge branch 'require-email'""

This reverts commit eb0650f72d2dc438f3888e6c245cb0944e520e3a.
Merge branch 'require-email'