Merge pull request dnephin#12 from jim/more-robust-go-lint

Use -set_exit_status instead of capturing output. Fixes dnephin#10.

Merge pull request dnephin#9 from jim/explicit-exits

Add explicit exit if any of the golint runs return non-zero.

Merge pull request dnephin#6 from akostibas/ak-fix-go-vet

Run `go tool vet` against single files instead of `go vet`

Add gometalinter.

Signed-off-by: Daniel Nephin <[email protected]>