Wiki images

![gantt_chart](https://cloud.githubusercontent.com/assets/9654634/5038987/96ec093a-6b97-11e4-8fd9-a71b4b81e6c6.png)
![individual_timelines](https://cloud.githubusercontent.com/assets/9654634/5038988/96edbfe6-6b97-11e4-96b0-ee8cc752d5ab.png)