Merge pull request #7 from Binarytales/master

Set record.message to ensure msg is shown in the Stackdriver UI

Merge pull request #6 from mlazarov/api-change-prp

preparatory: update for breaking gcloud API change

Bumping package version to 1.2.1

Improvements...

* Buffer messages to avoid quota overruns, use object streams, use GCP-standard option names, remove custom formatter, clean up...

* Allow projectId via env var. Use strict JSON.

* Update example.js

* Update README.md

* update to google-cloud/logging dep

See full change description in #1