Using EalsticSearch instead of mongo in related
Using EalsticSearch instead of mongo in related

It is an initial proof of concept for using ES. It is mostly broken ;)
ToDo:
- Use `mlt` instead of `search` method in Elasticsearch
The reference is at http://elasticsearch-py.readthedocs.org/en/latest/api.html
- Check why places, familynames and photounits return with object ids instead
of unit ids
- Use Hebrew mlt fields as well as the English ones
- Check and optimize the quality of the results
- Integrate es_mlt_search with api.get_bhp_related
- Add the results back (Redis -> Mongo)
- End to end test

Beit-Hatfutsot/dbs-back,Beit-Hatfutsot/dbs-back,Beit-Hatfutsot/dbs-back,Beit-Hatfutsot/dbs-back