gosimple seems to be eating all memory in CircleCI.  Testing disabling
the check to see if CI builds.

gometalinter has moved to versioned releases. The latest of the v1
major versioned releases can be retrieved through pkg.in. This
change moves gometalinter use to the latest v1 release.

Fixes: #507

Rather than just listing files that have errors, this now shows
the diff of what gofmt things should be the case, and what is
the case.

because you know, go vender n'stuff