Update copy for initial partner saved searches [MJ-779]

- Updates the title of the email from Saved Search Confirmation to Saved Search Notification
- Adds a blurb at the top of the email just after any custom message about this being created on the user's behalf
- Removes the bottom blurb about deleting this saved search

![2014-03-25-112643_632x262_scrot](https://f.cloud.github.com/assets/3379265/2513671/12c9986a-b432-11e3-8da0-51964e16db8d.png)

All tests pass.