fix doc typo
Merge pull request #12 from bmizerany/typo

fix doc typo
Close body even if it got error http status.

Otherwise, http connections keep open if server
returned error status (e.g. Get returned error).
Merge pull request #13 from ukai/fix_http

Close body even if it got error http status.
PeerPicker uses ring hash to pick peers
Merge pull request #15 from Obvious/master

PeerPicker uses ring hash to more consistently choose peers
HTTPPool increments Group.Stats.ServerRequests
Merge pull request #16 from Obvious/dpup-serverrequests

HTTPPool increments Group.Stats.ServerRequests