aradmand/btc — pull request #2 by aradmand (2014-12-15 13:20:53+00:00)
Title: [AJR] Implement 'validate_env' method

Implements the 'validate_env' method.

This enforces the requirement that the ``` :circle_customer_session_token ``` and ``` :circle_cookie ``` environment variables are set.