Saved search emails not unsubscribing [MJ-473]

Removes requirement that a user be logged in to disable/delete saved searches. This allows people who don't remember their credentials or don't realize they have an account to disable and delete searches from their email.

The previous change also requires a modification to a few templates to allow anonymous users to view them.

Also adds a view/template for unsubscribing to all my.jobs communications and redesigns saved search email footers.

Digests (blank email has been fixed and pushed already):
![2013-08-14-164348_656x186_scrot](https://f.cloud.github.com/assets/3379265/965012/4c6c4532-0522-11e3-81f6-e4bb78bc7106.png)

Individual
![2013-08-14-164358_658x212_scrot](https://f.cloud.github.com/assets/3379265/965013/4e90e5de-0522-11e3-83c3-6d583496bb26.png)


All tests pass.