Add a more complicated graph example.

Add an example that creates tasks that will
build a car and has the dependencies specified
to build the car in the right order and have each
task be submitted to the flow and then run and
watch the tasks occur in the right order automatically.

Change-Id: I17a2f621dfd7ceefb0a9c863e3e68b21b92672c2
Merge "Add a more complicated graph example."