Fix Godeps to include go-isatty
Fix Godeps to include go-isatty

rgeyer/rsc,rgeyer/rsc,lopaka/rsc,rightscale/rsc,rightscale/rsc,rgeyer/rsc,manuelfelipe/rsc,manuelfelipe/rsc,rightscale/rsc,manuelfelipe/rsc,lopaka/rsc,rightscale/rsc,lopaka/rsc,lopaka/rsc,rgeyer/rsc,rightscale/rsc,rgeyer/rsc,lopaka/rsc,manuelfelipe/rsc,manuelfelipe/rsc