some fixes.

Ex:

1> hackney:start().
ok
2> {ok, Status, Headers, Ref} = hackney:get("http://friendpaste.com").
{ok,301,
    [{<<"Server">>,<<"nginx/0.7.62">>},
     {<<"Date">>,<<"Sun, 01 Dec 2013 02:58:28 GMT">>},
     {<<"Content-Type">>,<<"text/html">>},
     {<<"Content-Length">>,<<"185">>},
     {<<"Connection">>,<<"keep-alive">>},
     {<<"Location">>,<<"https://friendpaste.com/">>}],
    #Ref<0.0.0.95>}
3> hackney:body(Ref).
{ok,<<"<html>\r\n<head><title>301 Moved
Permanently</title></head>\r\n<body
bgcolor=\"white\">\r\n<center><h1>301 Moved Per"...>>}