Fix ranch version in Makefile
Compile cowboy_sub_protocol behaviour before modules using it
Add cowboy:set_env/3
Merge branch 'fix_ranch_vsn' of git://github.com/nevar/cowboy
Added warn compile options. Fixed compile warnings.
Merge branch 'fix-warnings' of git://github.com/Egobrain/cowboy
Update AUTHORS
Update CHANGELOG
Update to 0.8.1
Fix to prevent loop handler awakening immediately after response sent

If a loop handler sent a response (e.g. cowboy_req:chunked_reply/2,/3)
and then returns {loop, Req, HandlerState, hibernate} it
would have a {cowboy_req, resp_sent} message in its message queue. This
message would cause the process to immediately awaken, so it is flushed
before hibernation.