Update TravisCI configs. (#409)
Update TravisCI configs. (#409)

The vet tool moved to the Go tree as of go1.5 so it does not
need to be installed seperately.  With the x/tools repo now gone,
remove the install step for vet since it fails.
synrg-labs/btcwallet,decred/dcrwallet,synrg-labs/btcwallet,Roasbeef/btcwallet,btcsuite/btcwallet,decred/dcrwallet,jrick/dcrwallet,Roasbeef/btcwallet,Stash-Crypto/btcwallet,jrick/btcwallet,Stash-Crypto/btcwallet,jrick/dcrwallet,btcsuite/btcwallet,jrick/btcwallet