Determined whether message was sent by logged in user properly

Thanks Daniela!

![screen shot 2014-12-03 at 4 02 56 pm](https://cloud.githubusercontent.com/assets/6354033/5291351/23977c7a-7b06-11e4-8e21-433094cbc1e6.png)


![screen shot 2014-12-03 at 4 03 02 pm](https://cloud.githubusercontent.com/assets/6354033/5291347/1258d314-7b06-11e4-9771-250b8bbef342.png)