Dedupe streaming endpoint events.
Merge branch 'unstable_predupsort_stream_dedupe' into unstable_predupsort

Conflicts:
	db/shard_test.go
	server/server_event_handlers_test.go
	server/server_handlers_test.go
Support passing prefix as query param.
Merge pull request #173 from skydb/predupsort_raw_query

Adds support for raw query and prefix as GET param
Fixes usage of prefix as GET param on query request.
Merge pull request #175 from skydb/predupsort_fix_rawquery

Fixes usage of prefix as GET param on query request
Fixes syntax error -_-
Queries should error if no prefix is provided.
Fixes prefix override.
Merge pull request #176 from Shopify/predupsort_fail_noprefix

Fail on no prefix and fix prefix override