aggregations support
Merge branch 'master' into aggregations
added test for aggregations
added description for aggregation and bucket types
Merge pull request #4 from bobrik/aggregations

Aggregations support
Added extrargs for searching

Extra args to allow routing parameter
Extra args for searching
Merge pull request #6 from r--w/master

Extra parameters for searching
conn.Search() is missing extraArgs param
Merge pull request #7 from needcaffeine/patch-1

Added missing param to conn.Search() in example doc
Added HTTP client override support
Merge pull request #8 from opsmatic/customclient

Added HTTP client override support