Alarm button

Add a button to each schedule item to add an alarm. Previously, we were allowing this to be triggered if the user clicks any part of the schedule item view (easy to get unintentional taps).

![2014-04-02 21 35 05](https://cloud.githubusercontent.com/assets/1742431/2597069/e5490596-baae-11e3-9c96-16c5ab169d19.png)