Incompatible with ElasticSearch > v0.90.4

[ssotomayor]

ElasticSearch after v0.90.4 replaced "custom_filters_score" query with "function_score", subsequently making all the queries to the server to fail.

Latest output from node server after doing GET to /city:

nested: QueryParsingException[[geonames] No query registered for [custom_filters_score]]; }]","status":400}' }