HRSPLT-154 : Add benefit confirmation implementation

Adds in implementation of the benefit confirmation section (name a working title).

![image](https://cloud.githubusercontent.com/assets/3534544/4364452/222523ae-42a0-11e4-840f-90aff8f03da7.png)

Note that if there is more than one confirmation it would list them, but they don't have any sample data with more than just one. :|


This turned out to be a typo in the spec/implementation of the HRS web service providing the benefit confirmations.  The `BenefitStatements` wrapper became `BenefitConfirmations` in #6 .