UI - Proposed message display update

• Message Bubble style
• Responsive design

![1](https://f.cloud.github.com/assets/77467/315942/44e3d35c-97f9-11e2-8e5b-8f9480208b05.png)
![2](https://f.cloud.github.com/assets/77467/315943/44f7de4c-97f9-11e2-88f3-8aa05e82cb50.png)
![3](https://f.cloud.github.com/assets/77467/315944/450e411e-97f9-11e2-9316-27e2694cef97.png)