discovery: add ability to proxy discovery requests
store: remove unused code
etcdhttp: set stats field in peer handler
Merge pull request #1312 from unihorn/165

etcdhttp: set stats field in peer handler
stats: fix data race when recording send result
Merge pull request #1316 from unihorn/168

stats: fix data race when recording send result
etcdserver: fix data race in leaderStats.Followers
Merge pull request #1317 from unihorn/169

etcdserver: fix data race in leaderStats.Followers
Merge pull request #1311 from jonboulle/remove_ttl

store: remove unused code
Merge pull request #909 from jonboulle/proxy

Support corporate proxy via env var
raft: remove unused compactThreshold
Merge pull request #1314 from jonboulle/raft_tests

raft: remove unused compactThreshold
discovery: switch to fake clock
godeps: add clockwork
store: switch to fake clock
etcdserver/etcdhttp: switch to using fake clock