No longer possible to add multiple notification email

You should be able to add multiple email addresses to the schedule, separated by comma's.

However for some reason the validation is currently failing.

![screen shot 2014-03-13 at 15 52 39](https://f.cloud.github.com/assets/308507/2411467/bc0ea1fa-aac7-11e3-9b58-c9181ffa786f.png)

Props to http://wordpress.org/support/view/plugin-reviews/backupwordpress