add web view for notifications
click reads a notification
redirect_to url action
make notification controller extendable
add spec for reading a notification (redirect action + update status)
remove feature tests that didnt work
update redirect action
mark all as read action
add unsubscribe functionality
add list of unsubscribable notifications
update generator + specs
add to unsubscribe list comment on generate
Update README.md

Added instructions for unsubscribing
add spec for unsubscribable
Merge branch 'web_notifications' of github.com:Papercloud/notify_user into web_notifications
add user hash generation
add unsubscribe link to emails
add controller spec for unauth unsubscribe
update spec
update readme