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

proxy: stats will record error response (including rewritten internel…

… errors)

fe: highlight 'S' button if proxy is primary only

deploy: update scripts

travis: add go1.7.1