Use startNodesAsync in more tests
Added test with AwaitsFix annotation that simulates a split brain.
[Docs]  Add experimental highlighter plugin
[DOCS] Added tables and fixes to upgrade.asciidoc, fixed version in README.textile
Author: Sean Gallagher
Date: 10 Apr 2014 15:23 EDT
Fixed an where a nested `nested` aggregation falls outside of its parent `nested` aggregation bounds.

The nested `nested` aggs now gets the proper parent docs that define its bounds correctly.

Closes #5728
The clear scroll apis now optionally accepts a scroll_id in it body.

Closes #5726
Ignored clear scroll rest test
[TEST] Prevent TTLPurger from recreating deleted index

Related to #5766
Each search request should use a new InternalSearchResponse instance even in case when all shards return no hits.
The InternalSearchResponse may get modified afterwards, so a new instance required at all times.
Strengthening pseudo random number generator and adding tests to verify its behavior.

Closes #5454 and #5578
Added multiple items search to More Like This query DSL.