Changes to Charge existing user with saved payment method

added the new optional request property browser_color_depth

added the new optional request property browser_java_enabled

added the new optional request property browser_screen_height

added the new optional request property browser_screen_width

added the new optional request property fail_url

added the new optional request property header_accept

added the new optional request property header_accept_language

added the new optional request property success_url

added the new optional request property time_zone_offset

added the optional property subscription/projected_revenue_279d to the response with the 200 status

added the optional property subscription/projected_revenue_92d to the response with the 200 status

added the optional property verify_url to the response with the 200 status