Improve golang setup, use Go 1.4
Improve golang setup, use Go 1.4

wfxiang08/livegrep,wfxiang08/livegrep,lekkas/livegrep,wfxiang08/livegrep,lekkas/livegrep,paulproteus/livegrep,wfxiang08/livegrep,paulproteus/livegrep,wfxiang08/livegrep,lekkas/livegrep,lekkas/livegrep,paulproteus/livegrep,paulproteus/livegrep,paulproteus/livegrep,paulproteus/livegrep,lekkas/livegrep,lekkas/livegrep,wfxiang08/livegrep