[WIP] Elasticsearch

- [ ] Basic insert/update/delete
- [ ] simple find and get
- [ ] Cleanup Query interface
- [ ] Cleanup Command interface
- [ ] finish querybuilder (add actual search abstraction)
- [ ] mget in ActiveRecord
- [ ] Http library - guzzle? selfmade? https://github.com/DaSourcerer/yii/compare/313-CHttpClient-ng#diff-2bfa7c7deb191ae11ad878c3306ebd92R1 ?