Update README to reflect actual usage.
Add key name to example in README.
Update README for using a Maybe host
Update metric collectors to handle optional host reporting.
Update gitignore to ignore sandboxes.
Bumpversion a full notch to reflect API change.
Remove redundant import.
Cleanup some things hlint found.
Fix merge conflict, re-include working API.
Merge pull request #9 from bbangert/master

Update API to allow host in the metric name to be optional.