Bmm add questions and responses

https://trello.com/c/nFgChcO0/14-as-a-user-i-can-choose-one-path-option-based-on-an-automatically-generated-scenario

![screenshot from 2014-11-20 09 38 56](https://cloud.githubusercontent.com/assets/8154429/5126199/31224798-7099-11e4-9a38-d1e5c63b0812.png)

![screenshot from 2014-11-20 09 39 09](https://cloud.githubusercontent.com/assets/8154429/5126200/34d6957e-7099-11e4-9a52-c5503d1f27b7.png)

![screenshot from 2014-11-20 09 39 28](https://cloud.githubusercontent.com/assets/8154429/5126203/3ad8436e-7099-11e4-84de-8086abd6a97a.png)

![screenshot from 2014-11-20 09 39 41](https://cloud.githubusercontent.com/assets/8154429/5126205/3f7db228-7099-11e4-8232-db72f5df2584.png)

`validates :positive, inclusion: { in: [true, false] }`