[#84265194] add line for spacing between approvals in emails

Still needs a little finesse. Anyone, feel free to grab this if you can figure out how to get the icons to overlap the lines :smile: 

![screen shot 2014-12-12 at 11 41 28 am](https://cloud.githubusercontent.com/assets/86842/5415260/fedebc1e-81f3-11e4-802c-9d59b0c9aa81.png)