utils: update atomic2.Int64

models: split auth with strings.SplitN

typo fix in fe/assets/index.html (CodisLabs#1261)

topom: make SlotsRebalance more stable

topom: set migration_async_numkeys=500 as default

travis: update go version

godep: upgrade

topom: show error message if check xauth fails

vender: update godeps

proxy: fix bug of issue CodisLabs#1078 & CodisLabs#1080

    json doesn't support map[int]string, using map[string]string instead