Make graph_objs.py compatible with new graph reference!

- created from @theengineear 's factories branch
- adapt graph reference INFO to new graph reference structure
- add doc content (e.g. links to plot.ly examples and parent keys for a given obj)

By 1 character: 
![image](https://cloud.githubusercontent.com/assets/6675409/4635807/50d7eac6-53dd-11e4-86d7-a7ebeca163f3.png)