Add 'go get'
Add 'go get'

To ensure we have all the necessary dependencies.

Solves this error:
  http.go:7:5: cannot find package "golang.org/x/net/websocket" in any of:
    /usr/local/go/src/golang.org/x/net/websocket (from $GOROOT)
    /srv/src/go/src/golang.org/x/net/websocket (from $GOPATH)
  Makefile:37: recipe for target 'build' failed
  make: *** [build] Error 1
  Makefile:23: recipe for target 'default' failed
  make: *** [default] Error 2

magneticio/vamp-workflow-agent,magneticio/vamp-workflow-agent,magneticio/vamp-workflow-agent,magneticio/vamp-workflow-agent,magneticio/vamp-workflow-agent