use the config() function call to get config values. this takes care of https://github.com/GigaOM/legacy-pro/issues/4314
"ingested" go-subscriptions-bstat so we're doing bstat tracking in go-recurly directly. note that the component name for tracked bstat footsteps changed from "go-subscriptions" to "go-recurly". see https://github.com/GigaOM/legacy-pro/issues/4127
Merge pull request #19 from wluo/freebird

merged go-subscriptions-bstat into go-recurly, and fixed subscription cancel bug