rename http_code to status_code
rename http_code to status_code

we may want to return non-http status codes here, see splash:go

Youwotma/splash,sunu/splash,pombredanne/splash,Youwotma/splash,kod3r/splash,pombredanne/splash,dwdm/splash,pawelmhm/splash,kod3r/splash,kod3r/splash,dwdm/splash,Youwotma/splash,pawelmhm/splash,sunu/splash,pawelmhm/splash,pombredanne/splash,kmike/splash,kmike/splash,sunu/splash,kmike/splash,dwdm/splash