[DOCS] Fixed typo
[DOCS] Added docs for term vectors
[DOCS] Added highlighting to the phrase suggester
[DOCS] Added "elastics" client for javascript
[DOCS] Added multi-index open/close
[DOCS] Added a few clarifications to the docs from the issues list
[DOCS] Added wildcard template matching
[DOCS] Added fuzzy options to completion suggester
[DOCS] Added clarification about global scope in facets
[DOCS] Tidied up the plugins page and added Graphite and Statsd
[DOCS] Added the human flag
[DOCS] Added function score query
[DOCS] Missing sort values now works for all field types
[DOCS] Fixed fielddata regex syntax
Add ClusterInfoService, DiskUsage and DiskThresholdDecider

Change AllocationDecider API to take ClusterInfoService, update all
other deciders
Switch to ImmutableMap
assert that totalBytes > freeBytes and totalBytes > 0
ImmutableMaps in constructor, not getters
make InternalClusterInfoService final
just don't set frequency if < 10s