Explain what "index" does briefly

Hint that "index" is "add or replace" for people not familiar with op_type.  Also fix the usage of ie, -> i.e.
Typo while/black -> white/black
Update has-child-filter.textile

Removed, depricated _scope and added filter option
Update has-child-filter.textile
Update has-parent-filter.textile

Removed _score and added filter option
Update bulk.textile

Fixed example error in partial update example
Update has-child-query.textile
Update has-parent-query.textile
Update has-child-query.textile
Add documentation on fielddata statistic API
This new feature is not yet documented: https://github.com/elasticsearch/elasticsearch/issues/2889
Closes #443
Update for Surfiki Refine Addtion
Merge pull request #444 from AnthonyNystrom/master

Added Surfiki Refine to list of client integrations
Updated plugins with redis. Ordered non-elastic team river plugins alphabetically.
Merge pull request #445 from sksamuel/patch-1

Updated plugins with redis. Ordered non-elastic team river plugins alpha...
Corrected author
Merge pull request #446 from sksamuel/patch-1

Corrected author
Added documentation for doc_as_upsert
Added link to goes (requested by @dadoonet)
Merge pull request #448 from jeromer/patch-1

Added link to goes (requested by @dadoonet)
Added link to neo4j river plugin