Automatic Graph Layout recharge project

Menu command:  Menu > Edit > Autolay Nodes
Keyboard shortcut:  Ctrl + L
- The number of connector crossings will be minimized.
- All the input nodes will be put on the leftmost layer.  All the output nodes will be put on the rightmost layer.
- The autolaid output nodes will be ordered based on their original vertical ordering.

!["Autolay Nodes" command](https://cloud.githubusercontent.com/assets/6386550/3300397/a5dec6ae-f620-11e3-94d9-761c7f2103dd.jpg)

Cleanup Node Layout would be a more user friendly option.