Workaround travis failures around gopkg.in imports
Workaround travis failures around gopkg.in imports

By manually installing it.
bcandrea/tail,liyam/tail,bfitzsimmons/tail,ActiveState/tail,wfxiang08/tail,ando-masaki/tail,rakutentech/tail,davidsansome/tail,miraclesu/tail,masahide/tail,ekini/tail,wrouesnel/tail,deepakm/tail,42wim/tail