'withElasticSearchLogger' no longer fails when the Elasticsearch server is down.
Now works with bloodhound-0.14.0.0 (#30).
Log.Backend.ElasticSearch.Internal now exports 'EsUsername' and 'EsPassword'.
- Made ElasticSearchConfig an abstract type (#27).
- Added support for HTTPS and basic auth (#26).
- Initial release (split from the log package).