Changed the caching of FieldDataSource in aggs to be based on field name + required Value Source type as a combi key (used to be only field name). This fixes a problem where multiple aggregations where defined on the same field, yet require different types of value sources.

Closes #5190
Disable RAM usage estimation on Lucene 3.x segments.

Close #5201
Add "locale" parameter to query_string and simple_query_string

Fixes #5128

Remove java 7 specific Locale functions, add "coming[1.1.0]" to documentation

add LocaleUtils utility class for dealing with Locale functions
Fix yamlBuilder() to return YAML builder instead of SMILE

Closes #5185
Remove useless URL instanciation
Fix possible exception in toCamelCase method
Fixed an issue where and IndexOutOfBoundsException was thrown when a date_/histogram aggregation was defined on unmapped field and also had a sub aggregation. The root cause there was that in such case, the estimated bucket count was 0, and the code was not designed to handle that well.

Closes #5179
Document the indices segments response format.
Fixed per-field forceSource highlighting option

Closes #5220
Fixed field names returned when using wildcard expression to specify fields to highlight

Closes #5221
Fixed multi term queries support in postings highlighter for non top-level queries

In #4052 we added support for highlighting multi term queries using the postings highlighter. That worked only for top-level queries though, and not for multi term queries that are nested for instance within a bool query, or filtered query, or a constant score query.

The way we make this work is by walking the query structure and temporarily overriding the query rewrite method with a method that allows for multi terms extraction.

Closes #5102