Fixes to ElasticSearch Usage Statistics (XMLUI)

- Fix countryCode
- change initial date range to a year-ish
- fix datepicker
- Add labels to datepicker to/from
Move Elastic Search stats mapping to resource json file
Enable Elastic Search by default, bump lucene to 4.5.0
Merge pull request #6 from LongsightGroup/elastic-fixes

Fixes to Elastic Search, and make enabled by default