Pull Request

![plot1](https://cloud.githubusercontent.com/assets/3178134/3565957/83aa0fa4-0add-11e4-835a-8e177f8a72ce.png)
![plot2](https://cloud.githubusercontent.com/assets/3178134/3565958/8e4c2398-0add-11e4-8852-14bf2220776a.png)
![plot3](https://cloud.githubusercontent.com/assets/3178134/3565959/8e51508e-0add-11e4-8053-277f499f263c.png)
![plot4](https://cloud.githubusercontent.com/assets/3178134/3565960/8e57a9a2-0add-11e4-92dd-72a287d6e836.png)