Fix #30: use class instance variable to store config
Fix #30: use class instance variable to store config

reedloden/secureheaders,wlchou/secureheaders,eoy/secureheaders,didacte/secureheaders,eoy/secureheaders,codelion/secureheaders,wlchou/secureheaders,twitter/secureheaders,wlchou/secureheaders,reedloden/secureheaders,didacte/secureheaders,didacte/secureheaders,reedloden/secureheaders,jacobbednarz/secureheaders,codelion/secureheaders,davidhan527/secureheaders,eoy/secureheaders,codelion/secureheaders