[tracker] Query

[at15]

• query generator
  • standard query parser, support multiple field, facet etc. e014d9f
• pagination
• decode response to struct, we can let user convert those map[string]interface{} by themselves
• facet

Ref

Solr

• https://godoc.org/github.com/vanng822/go-solr/solr#Query
• https://github.com/sendgrid/go-solr/blob/master/solr_response.go

Query builder

• SQL https://github.com/Masterminds/squirrel
• RethinkDB https://github.com/GoRethink/gorethink