add face controls into game system/handle sentiment

[mjsobrep]

I think that the first step to this is to build some sort of sentiment engine that keeps track of the robots sentiment and the subject's sentiment

1. Have a slider on the web interface to define the robot and subject sentiment
2. Have faces change based on the joint interaction of the sentiments
3. Move to having the subject's sentiment measured through facial recognition and success of motion
4. Automate a sense of sentiment for the robot based on all of the inputs it has