Manually type in /logout --> 500 error

[JP Slavinsky]

An exception occurred: bad argument (expected URI object or URI string)
.../lib/ruby/1.9.1/uri/common.rb:996:in URI' ...app/controllers/sessions_controller.rb:40:indestroy'

[Dante Soares]

I suppose we can redirect back to the accounts main page if there's no referer, even though that sucks.